Ervin Yen

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Ervin Yen
Prior offices
Oklahoma State Senate District 40
Years in office: 2014 - 2018
Successor: Carri Hicks (D)
Elections and appointments
Last election
June 16, 2026
Education
High school
Putnam City High School
Bachelor's
University of Oklahoma, 1977
M.D.
University of Oklahoma, 1981
Other
University of Oklahoma Health Sciences Center, 1984
Personal
Religion
Roman Catholic
Profession
Physician
Contact

Ervin Yen (Republican Party) was a member of the Oklahoma State Senate, representing District 40. He assumed office on November 19, 2014. He left office on November 21, 2018.

Yen (Democratic Party) ran for election to the U.S. Senate to represent Oklahoma. He lost in the Democratic primary on June 16, 2026.

Yen completed Ballotpedia's Candidate Connection survey in 2026. Click here to read the survey answers.

On October 19, 2021, Yen announced that he had changed his partisan affiliation from Republican to independent.[1]

Biography

Ervin Yen earned a high school diploma from Putnam City High School. He earned a bachelor's degree and an M.D from the University of Oklahoma in 1977 and 1981, respectively. He finished his residency at the University of Oklahoma Health Sciences Center in 1984. His career experience includes working as a doctor.[2][3]

Committee assignments

2017 legislative session

At the beginning of the 2017 legislative session, this legislator served on the following committees:

Oklahoma committee assignments, 2017
Appropriations
Health and Human Services, Chair
Public Safety

2015 legislative session

At the beginning of the 2015 legislative session, Yen served on the following committees:

Elections

2026

See also: United States Senate election in Oklahoma, 2026

United States Senate election in Oklahoma, 2026 (August 25 Democratic primary runoff)

United States Senate election in Oklahoma, 2026 (June 16 Democratic primary)

United States Senate election in Oklahoma, 2026 (June 16 Republican primary)

General election

The general election will occur on November 3, 2026.

The candidate list in this election may not be complete.

General election for U.S. Senate Oklahoma

N'Kiyla Thomas (D), Kevin Hern (R), Sevier White (L), Ron Meinhardt (Independent), and Curtis Stinnett (Independent) are running in the general election for U.S. Senate Oklahoma on November 3, 2026.

Candidate
Image of N'Kiyla Thomas
N'Kiyla Thomas (D)  Candidate Connection
Image of Kevin Hern
Kevin Hern (R)
Sevier White (L)
Image of Ron Meinhardt
Ron Meinhardt (Independent)
Image of Curtis Stinnett
Curtis Stinnett (Independent)  Candidate Connection

Candidate Connection = candidate completed the Ballotpedia Candidate Connection survey.
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Democratic primary runoff

Democratic primary runoff for U.S. Senate Oklahoma

N'Kiyla Thomas (D) defeated Jim Priest (D) in the Democratic primary runoff for U.S. Senate Oklahoma on August 25, 2026.

Candidate
%
Votes
Image of N'Kiyla Thomas
N'Kiyla Thomas  Candidate Connection
 
58.7
 
34,111
Image of Jim Priest
Jim Priest  Candidate Connection
 
41.3
 
23,983

Total votes: 58,094
Candidate Connection = candidate completed the Ballotpedia Candidate Connection survey.
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Democratic primary

Democratic primary for U.S. Senate Oklahoma

N'Kiyla Thomas (D) and Jim Priest (D) advanced to a runoff. They defeated Troy W. Green (D), Ervin Yen (D), and R.O. Joe Cassity (D) in the Democratic primary for U.S. Senate Oklahoma on June 16, 2026.

Candidate
%
Votes
Image of N'Kiyla Thomas
N'Kiyla Thomas  Candidate Connection
 
45.2
 
76,330
Image of Jim Priest
Jim Priest  Candidate Connection
 
23.9
 
40,290
Image of Troy W. Green
Troy W. Green  Candidate Connection
 
19.8
 
33,492
Image of Ervin Yen
Ervin Yen  Candidate Connection
 
6.7
 
11,363
Image of R.O. Joe Cassity
R.O. Joe Cassity
 
4.4
 
7,421

Total votes: 168,896
Candidate Connection = candidate completed the Ballotpedia Candidate Connection survey.
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Withdrawn or disqualified candidates

Republican primary

Republican primary for U.S. Senate Oklahoma

Kevin Hern (R) defeated Gary England (R), Sean Buckner (R), Brian Ragain (R), and Nick Hankins (R) in the Republican primary for U.S. Senate Oklahoma on June 16, 2026.

Candidate
%
Votes
Image of Kevin Hern
Kevin Hern
 
69.8
 
267,222
Image of Gary England
Gary England  Candidate Connection
 
13.5
 
51,875
Sean Buckner
 
6.9
 
26,444
Image of Brian Ragain
Brian Ragain  Candidate Connection
 
5.9
 
22,478
Image of Nick Hankins
Nick Hankins  Candidate Connection
 
3.9
 
15,066

Total votes: 383,085
Candidate Connection = candidate completed the Ballotpedia Candidate Connection survey.
If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey.

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Withdrawn or disqualified candidates

Libertarian Party primary

The Libertarian Party primary scheduled for June 16, 2026, was canceled. Sevier White (L) advanced from the Libertarian Party primary for U.S. Senate Oklahoma without appearing on the ballot.

Endorsements

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2022

See also: Oklahoma State Senate elections, 2022

General election

General election for Governor of Oklahoma

Incumbent Kevin Stitt defeated Joy Hofmeister, Natalie Bruno, and Ervin Yen in the general election for Governor of Oklahoma on November 8, 2022.

Candidate
%
Votes
Image of Kevin Stitt
Kevin Stitt (R)
 
55.4
 
639,484
Image of Joy Hofmeister
Joy Hofmeister (D)
 
41.8
 
481,904
Image of Natalie Bruno
Natalie Bruno (L) Candidate Connection
 
1.4
 
16,243
Image of Ervin Yen
Ervin Yen (Independent) Candidate Connection
 
1.4
 
15,653

Total votes: 1,153,284
Candidate Connection = candidate completed the Ballotpedia Candidate Connection survey.
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Withdrawn or disqualified candidates

Democratic primary election

Democratic primary for Governor of Oklahoma

Joy Hofmeister defeated Constance Johnson in the Democratic primary for Governor of Oklahoma on June 28, 2022.

Candidate
%
Votes
Image of Joy Hofmeister
Joy Hofmeister
 
60.7
 
101,913
Image of Constance Johnson
Constance Johnson Candidate Connection
 
39.3
 
65,894

Total votes: 167,807
Candidate Connection = candidate completed the Ballotpedia Candidate Connection survey.
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Republican primary election

Republican primary for Governor of Oklahoma

Incumbent Kevin Stitt defeated Joel Kintsel, Mark Sherwood, and Moira McCabe in the Republican primary for Governor of Oklahoma on June 28, 2022.

Candidate
%
Votes
Image of Kevin Stitt
Kevin Stitt
 
69.1
 
248,525
Image of Joel Kintsel
Joel Kintsel Candidate Connection
 
14.3
 
51,587
Image of Mark Sherwood
Mark Sherwood Candidate Connection
 
13.3
 
47,713
Image of Moira McCabe
Moira McCabe Candidate Connection
 
3.3
 
12,046

Total votes: 359,871
Candidate Connection = candidate completed the Ballotpedia Candidate Connection survey.
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Withdrawn or disqualified candidates

Libertarian primary election

The Libertarian primary election was canceled. Natalie Bruno advanced from the Libertarian primary for Governor of Oklahoma.

2018

See also: Oklahoma State Senate elections, 2018

General election

General election for Oklahoma State Senate District 40

Carri Hicks defeated Joe Howell and Christopher Hensley in the general election for Oklahoma State Senate District 40 on November 6, 2018.

Candidate
%
Votes
Image of Carri Hicks
Carri Hicks (D)
 
57.8
 
15,572
Image of Joe Howell
Joe Howell (R)
 
38.7
 
10,426
Image of Christopher Hensley
Christopher Hensley (Independent)
 
3.5
 
945

Total votes: 26,943
Candidate Connection = candidate completed the Ballotpedia Candidate Connection survey.
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Democratic primary election

Democratic primary for Oklahoma State Senate District 40

Carri Hicks defeated Danielle Ezell in the Democratic primary for Oklahoma State Senate District 40 on June 26, 2018.

Candidate
%
Votes
Image of Carri Hicks
Carri Hicks
 
51.4
 
5,350
Danielle Ezell
 
48.6
 
5,054

Total votes: 10,404
Candidate Connection = candidate completed the Ballotpedia Candidate Connection survey.
If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey.

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Republican primary election

Republican primary for Oklahoma State Senate District 40

Joe Howell defeated incumbent Ervin Yen in the Republican primary for Oklahoma State Senate District 40 on June 26, 2018.

Candidate
%
Votes
Image of Joe Howell
Joe Howell
 
60.0
 
5,316
Image of Ervin Yen
Ervin Yen
 
40.0
 
3,537

Total votes: 8,853
Candidate Connection = candidate completed the Ballotpedia Candidate Connection survey.
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2014

See also: Oklahoma State Senate elections, 2014

Elections for the Oklahoma State Senate took place in 2014. A primary election took place on June 24, 2014. The general election was held on November 4, 2014. The signature filing deadline for candidates wishing to run in this election was April 11, 2014. John Handy Edwards was unopposed in the Democratic primary, while Steve Kern and Ervin Yen defeated Joe Howell, Michael Taylor, David Hooten and Brian Winslow in the Republican primary. Yen defeated Kern in the August 26 primary runoff. Yen defeated Edwards in the general election.[4][5][6]

Oklahoma State Senate, District 40 General Election, 2014
Party Candidate Vote % Votes
     Republican Green check mark transparent.pngErvin Yen 54.5% 10,473
     Democratic John Handy Edwards 45.5% 8,753
Total Votes 19,226
Oklahoma State Senate, District 40 Republican Primary, 2014
Candidate Vote % Votes
Green check mark transparent.pngErvin Yen (advanced to runoff) 39.5% 2,533
Green check mark transparent.pngSteve Kern (advanced to runoff) 20.1% 1,289
Brian Winslow 12.2% 781
David Hooten 11.2% 718
Joe Howell 9.5% 606
Michael Taylor 7.5% 483
Total Votes 6,410
Oklahoma State Senate, District 40, Run-off Republican Primary, 2014
Candidate Vote % Votes
Green check mark transparent.pngErvin Yen (advanced to general election) 65.2% 3,388
Steve Kern 34.8% 1,808
Total Votes 5,196

Campaign themes

2026

Ballotpedia survey responses

See also: Ballotpedia's Candidate Connection

Candidate Connection

Ervin Yen completed Ballotpedia's Candidate Connection survey in 2026. The survey questions appear in bold and are followed by Yen's responses.

Expand all | Collapse all

I’m the only candidate with more than 40 years of doing intensive research, prioritizing data and observation, leading a team of experts, and making critical decisions in high-pressure life and death situations. And that’s exactly how serious the challenges are for Oklahoman’s, for democracy, for our nation. There are currently four medical doctors in the US Senate. Oklahoma deserves that kind of expertise there. I’m the only candidate that counsel’s patients at the Bethesda Free clinic where I volunteer, on how to live healthier lives. Our state is 47th in the nation on most health metrics. I’m the only candidate that knows the ins and outs of healthcare as the former chairman of the health and human services committee in the state senate. As the president of one of the largest groups of anesthesiologists in the state, I’m the only candidate that knows about healthcare funding from Medicaid, Medicare, workers comp, Tricare, & insurance companies. Now I may not be the only candidate that knows more about healthcare than RFK Jr, but I am the only one with a diploma to prove it and the only candidate that’s served and worked closely with both elected Democrats and Republicans. I’ve been married 40 years, I’m the father of five, I work out every day and yes, I do Bicycle a couple times around like Lake Hefner four days a week. I have the physical, mental, emotional and spiritual stamina to take on the idiocy of what’s happening in Washington, D.C. and bring real change.
  • The cost of living is way too high, because of what is happening in D.C. We have 5 adult children and I worry whether they will be able to afford home ownership, property insurance, healthcare, utilities, childcare, groceries, and gasoline to drive to work. My parents were middle class. D.C. is not looking out for folks like my parents, my children, and everyday Oklahomans and Americans. I promise I will go to the U.S. Senate to represent those people, not corporate fat cats, not lobbyists, not political action committees, not insurance companies, and certainly not billionaires. My parents came to America from Taiwan, because they feared the proximity of Communist China. They also came for the benefit of their four children.
  • The overturning of Roe vs Wade was unconsionable. I am 100% in favor of a woman's right to choose in the first trimester. I will debate on the floor of the U.S. Senate chamber when life begins. The answer is not black and white. Why don't we look at when life begins as we do when life ends. As a cardiac anesthesiologist, I anesthetized many patients for heart translplants, lung transplants, as well as kidney transplants. When does a donor become a donor? When they have no brain activity or no consciousness. A fetus in the first trimester has no brain. It does have something called a neural tube that will later become the brain. There is certainly no electrical activity, no brain waves, and no consciousness at that time.
  • Voting is a key part, if not the key part, of our democracy. What the U.S. Supreme Court has done to the Voting Rights Act of 1965 is absolutely wrong. The part of the S.A.V.E. Act that requires a birth certificate when someone registers to vote is wrong. Many women, like my wife have an I.D. that differs from their birthcertificate. Thankfully, my wife does have a passport, but most women do not. What are they to do? My birth certificate from Taiwan is in Chinese and certainly differs from my I.D., but I also have a passport. This is all a ploy by folks in D.C. to disenfranchise folks who are not pro-Trump. It stinks. I will change these things when I am a U.S. Senator.
As a physician, I am passionate about healthcare public policy. Vaccination rates across the country have plummeted. In medicine, whether we are talking about a medication, a procedure, or a surgery, what is most important is looking at the benefits versus the risks. The benefits of vaccines far, far outweigh the risks, and let's look at their cost effectiveness. Incredibly inexpensive for the payoff. What our President has done to the CDC and the Health and Human Services Committee and withdrawing from the World Health Organization is terrifying, especially in the face of Hantavirus and Ebola, not to mention another pandemic like Covid-19 (which is not entirely gone) in our future. All Americans deserve access to healthcare.

Note: Ballotpedia reserves the right to edit Candidate Connection survey responses. Any edits made by Ballotpedia will be clearly marked with [brackets] for the public. If the candidate disagrees with an edit, he or she may request the full removal of the survey response from Ballotpedia.org. Ballotpedia does not edit or correct typographical errors unless the candidate's campaign requests it.

2022

Candidate Connection

Ervin Yen completed Ballotpedia's Candidate Connection survey in 2022. The survey questions appear in bold and are followed by Yen's responses.

Expand all | Collapse all

I am a pro-choice, moderate, conservative Independent running for Governor in Oklahoma. As a former Republican state senator I believe the extremism of both the Republicans and Democrats has left most Oklahoman's without a voice. Voters are tired of the political fighting and electing candidates who are tied to the agendas of a political party.

With almost 410,000 registered Independents in Oklahoma, there are now enough Independents to win the Governor's seat. Oklahoman's are ready for a Governor who can work across political party lines,representing the will of the people and start fixing the problems facing our state. It is ludicrous to believe that a candidate who has been ineffective in 4 years (Stitt) and 8 years (Hofmiester) will be able to get things done now. Making healthcare more affordable and accessible for all Oklahomans is one of my priorities. That can be done in part by offering financial incentives to medical students who will in turn commit to working in some of our rural areas upon graduation. Working with the state attorney general's office we can lower the cost of many prescription drugs by criminalizing price gouging.

Our Education system needs immediate attention, and I propose using 1/4 of the state's surplus to raise teacher pay to be competitive with the rest of the nation, as well as ensure there is an equitable division of funds across state school districts.
  • This is the first chance Oklahomans will have to elect our first Independent Governor. There are now over 410,000 registered Independents in Oklahoma. We have never had an election with this many Independents.
  • We cannot continue to elect and depend on the same people who broke the system to fix it. We must be willing to do something different in order to get the results we are seeking.
  • An Independent Candidate is the only one who can truly move our state forward.
Healthcare. Education. Jobs. Infrastructure.
I have looked up to many people. My mother and father both were incredible people. My mother was a research scientist for the Oklahoma Medical Research Foundation for over 25 years. And my father was a structural design bridge engineer for the Oklahoma Department of Transportation. Politically, however, I have always looked up to John F Kennedy. His capacity to inspire the American people was something that I'll never forget, as well as his ability to galvanize a nation to become everything we could be together.
I am a problem solver by nature. After 40+ years in the OR I can assure you that my ability to solve complex problems will be one of the primary attributes that helps me lead this state in the right direction.
I'd like to be the first Independent Governor ever elected in the state of Oklahoma who actually fixed the failing education and healthcare system in our state!
The Kennedy Assassination. I was only 8 years old and I remember it like it happened yesterday.
When I was 16 years old I started working at McDonalds and worked for minimum wage, which was $1.60 an hour in 1970.
Kato = The Green Hornet's Sidekick
OR 007 - James Bond
Governor's are responsible for implementing state laws and overseeing the operation of the state executive branch
The responsibility to lead the state with integrity and transparency is paramount to an effective administration. To not overreach authority and to ensure that the laws are adhered to while the executive branch is operating effectively.
It is the Governor's responsibility to ensure that there is a state budget that works for all departments of the state from which the people of Oklahoma ultimately benefit.
That they work in harmony for the best interest of moving forward for the people of Oklahoma.
Governor Stitt was reelected.
HA!

Note: Ballotpedia reserves the right to edit Candidate Connection survey responses. Any edits made by Ballotpedia will be clearly marked with [brackets] for the public. If the candidate disagrees with an edit, he or she may request the full removal of the survey response from Ballotpedia.org. Ballotpedia does not edit or correct typographical errors unless the candidate's campaign requests it.

2014

Yen's campaign website highlighted the following issues:[7]

Guns

  • Excerpt: "As a conservative gun owner with a concealed carry permit myself, I will vigorously fight any attempts to weaken the ability of law-abiding citizens to own firearms, to hunt or to defend themselves and their families."

Jobs and the Economy

  • Excerpt: "As your Senator, I will work to make Oklahoma a more attractive business environment to encourage more quality, high-paying private sector jobs to come to our state."

Pro-Life

  • Excerpt: "I am 100% committed to the pro-life movement and will do everything I can to help promote a culture of life in our state. As such, as your Senator, I will do everything in my power, not just to bring about an end to abortion, but to promote alternatives by making it easier for Oklahomans to adopt, increasing the services available to women who choose to carry their babies and improving the state foster care system."

Obamacare

  • Excerpt: "As your Senator, I will do everything I can to free us from the oppressive regulations of Obamacare and work toward a health care system that works for Oklahoma patients instead of left-wing government bureaucrats."

Education

  • Excerpt: "Providing the best quality education for our state's students should be our top priority. While funding is certainly a part of that, we already spend over half of the entire state budget on education. I think it is more important that we look at how those funds are spent and work to reduce administrative overhead and make sure that as many dollars as possible actually make their way into the classroom. We also need to be supporting our top teachers through merit pay."
  • Excerpt: "We MUST promote math, science, technology, and engineering in our schools. We need rigorous state educational standards to prepare our students and we need to hold our schools and state educational leaders accountable for preparing our students for the future in Oklahoma. And we should continue seeking creative avenues, including school vouchers, to provide the best opportunities for Oklahoma students."

Campaign finance summary


Note: The finance data shown here comes from the disclosures required of candidates and parties. Depending on the election or state, this may represent only a portion of all the funds spent on their behalf. Satellite spending groups may or may not have expended funds related to the candidate or politician on whose page you are reading this disclaimer. Campaign finance data from elections may be incomplete. For elections to federal offices, complete data can be found at the FEC website. Click here for more on federal campaign finance law and here for more on state campaign finance law.


Ervin Yen campaign contribution history
YearOfficeStatusContributionsExpenditures
2026* U.S. Senate OklahomaLost primary$20,793 $20,793
2022Governor of OklahomaLost general$368,881 $366,034
2018Oklahoma State Senate District 40Lost primary$250,915 N/A**
2014Oklahoma State Senate, District 40Won $410,817 N/A**
Grand total$1,051,406 $386,827
Sources: OpenSecretsFederal Election Commission ***This product uses the openFEC API but is not endorsed or certified by the Federal Election Commission (FEC).
* Data from this year may not be complete
** Data on expenditures is not available for this election cycle
Note: Totals above reflect only available data.

The following table lists bills this person sponsored as a legislator, according to BillTrack50 and sorted by action history. Bills are sorted by the date of their last action. The following list may not be comprehensive. To see all bills this legislator sponsored, click on the legislator's name in the title of the table.


Scorecards

See also: State legislative scorecards, State legislative scorecards in Oklahoma

A scorecard evaluates a legislator’s voting record. Its purpose is to inform voters about the legislator’s political positions. Because scorecards have varying purposes and methodologies, each report should be considered on its own merits. For example, an advocacy group’s scorecard may assess a legislator’s voting record on one issue while a state newspaper’s scorecard may evaluate the voting record in its entirety.

Ballotpedia is in the process of developing an encyclopedic list of published scorecards. Some states have a limited number of available scorecards or scorecards produced only by select groups. It is Ballotpedia’s goal to incorporate all available scorecards regardless of ideology or number.

Click here for an overview of legislative scorecards in all 50 states. To contribute to the list of scorecards, email suggestions to editor@ballotpedia.org.

Below you can find the scorecards found for the Oklahoma State Legislature in 2018.

Below you can find the scorecards found for the Oklahoma State Legislature in 2017.

Below you can find the scorecards found for the Oklahoma State Legislature in 2016.

Below you can find the scorecards found for the Oklahoma State Legislature in 2015.

See also


External links

Footnotes

Political offices
Preceded by
Cliff Branan (R)
Oklahoma State Senate District 40
2014-2018
Succeeded by
Carri Hicks (D)


Senators
Representatives
District 1
District 2
District 3
District 4
Tom Cole (R)
District 5
Republican Party (7)