Don
Leonard
Democratic challenger Don Leonard, a former Ohio State planning professor, is running against incumbent Rep. Mike Carey in Ohio's 15th Congressional District in 2026.
- sources
- 15
- positions
- 10
- endorsements
- 11
Background
Don Leonard is the Democratic candidate challenging incumbent Republican Rep. Mike Carey in Ohio's 15th Congressional District in the November 3, 2026 general election. He has never previously held elected office. 124
Leonard served two years in the U.S. Peace Corps in South America after college, later earning degrees in political science and regional development from the University of Massachusetts Lowell and a Ph.D. in government from Cornell University. He subsequently completed postdoctoral work at Tulane University. 124
For roughly a decade, Leonard taught city and regional planning at The Ohio State University. He stepped down from that position in early 2026 to pursue his congressional campaign full-time. His campaign is based in Columbus, Ohio. 16
Leonard describes himself as "a proud Democrat" and is running on a platform focused on issues affecting central Ohio. 1
At a glance
- Party
- Democratic
- Running for
- U.S. House · District 15, Ohio
- Election
- Nov 3, 2026
- Website
- donforohio.com(opens in a new tab)
Where they stand
Each position links to the page it was drawn from. Quotes are verbatim.
Timeline
- Oct 9newsReuters reports Leonard raised ~$600,000 vs. Carey's $3.3 million through June 30
Federal FEC figures cited in a Reuters report showed Leonard had raised approximately $606,658 (mostly from individual contributors) with $252,402 cash on hand through June 30, compared to Carey's $3.3 million (more than half from PACs).
Could GOP troubles put Carey's seat in play? It'd take a giant blue wave · Oct 9, 2026 (opens in a new tab) - Oct 9newsRepublican super PAC spends ~$320,000 on opposition ads against Leonard
By October 9, Republican super PAC Defending Main Street had spent about $320,000 on opposition ads against Leonard, according to Reuters. The ads highlighted Leonard's March arrest. National Democratic strategists were also reportedly considering additional spending against Carey.
Could GOP troubles put Carey's seat in play? It'd take a giant blue wave · Oct 9, 2026 (opens in a new tab) - Oct 5newsLeonard outlines policy platform in WOSU interview, calls himself a 'Do Something Democrat'
In a WOSU interview, Leonard described affordability—health care, childcare, homeownership, and aging—as his top four issues. He backed a Medicare public option, a national universal-childcare model, replacing ICE, and federal rules on data-center siting. He also called for a constitutional amendment to remove corporate and foreign-lobby money from politics, opposed congressional stock trading, and said he would not back Hakeem Jeffries for Speaker if Jeffries failed to reinvent the Democratic Party.
'Do Something Democrat' Don Leonard hopes to flip the script in ... · Oct 5, 2026 (opens in a new tab) - Sep 30newsSabato's Crystal Ball shifts OH-15 rating from 'Safe Republican' to 'Likely Republican'
In late September, Sabato's Crystal Ball shifted its rating of Ohio's 15th District from 'Safe Republican' to 'Likely Republican,' reflecting increased competitiveness. Cook Political Report also rated the district 'Likely Republican.' Crystal Ball editor Kyle Kondik said Leonard would need 'a lot of things to go right to win.'
Could GOP troubles put Carey's seat in play? It'd take a giant blue wave · Oct 9, 2026 (opens in a new tab) - Sep 22pollPoll shows Leonard and Carey effectively tied at 46%-45% in OH-15
A Hart Research Associates poll of 500 likely voters conducted around September 22–24 showed Leonard at 46% and Carey at 45%. The poll was listed by Election.org; no margin of error or commissioning source was provided, and the result could not be independently verified.
2026 Ohio District 15 U.S. House Election: Polls, Candidates, Money & Dates | Election.org · Sep 22, 2026 (opens in a new tab) - Sep 16endorsementAFGE endorses Leonard for Ohio's 15th Congressional District
The American Federation of Government Employees, the largest federal employee union, announced its endorsement of Don Leonard in the OH-15 race.
Largest Federal Employee Union Endorses Ohio Rep. ... · Sep 16, 2026 (opens in a new tab) - May 5filingLeonard wins Democratic primary in OH-15, defeating Adam Miller
Don Leonard won the Democratic nomination in the May 5 primary, defeating Adam Miller, to become the Democratic challenger to Republican incumbent Mike Carey in Ohio's 15th Congressional District.
Could GOP troubles put Carey's seat in play? It'd take a giant blue wave · Oct 9, 2026 (opens in a new tab)
Endorsements
- CAIR Ohio organizationListed among Leonard's endorsers in an iVoterGuide profile; no dated primary announcement found in the sources reviewed. ivoterguide.com
- Planned Parenthood Action Fund organizationListed on the Action Fund's 2026 endorsements page; Leonard also referred to the endorsement in a WYSO interview published October 5, 2026. plannedparenthoodaction.org
- Ohio Federation of Teachers unionListed on the Ohio Organizing Campaign's candidate page; no endorsement date given. ohioorganizingcampaign.org
- Ohio AFL-CIO unionListed among Leonard's endorsers in an iVoterGuide profile; no dated primary announcement found in the sources reviewed. ivoterguide.com
- College Democrats of Ohio organizationListed by Smarter.Vote based on a College Democrats of Ohio Instagram endorsement; exact date not established. smarter.vote
- Planned Parenthood Advocates of Ohio organizationListed on the Ohio Organizing Campaign's candidate page; no endorsement date given. ohioorganizingcampaign.org
- Ohio Education Association (OEA) organizationOEA's 2026 election guide lists 'Don Leonard (D)' among recommended candidates for Congressional District 15. Guide updated September 19, 2026. ohea.org
- Franklin County Young Democrats organizationListed by Smarter.Vote based on a campaign Instagram endorsement; exact date not established. smarter.vote
- Stand Up for Science organizationStand Up for Science named Leonard among its endorsed congressional candidates in a press announcement. einpresswire.com · Oct 2, 2026
- American Federation of Government Employees (AFGE) unionAFGE announced its endorsement of Leonard for Ohio's 15th District, describing itself as the largest federal employee union. afge.org · Sep 16, 2026
- End Citizens United organizationEnd Citizens United announced its endorsement and said Leonard was part of its Unrig Washington program. endcitizensunited.org · Jun 18, 2026
Campaign finance
Totals filed with the Federal Election Commission for the 2026 election cycle.
- Raised
- $607K
- Spent
- $354K
- Cash on hand
- $252K
As of Jun 30, 2026. Filings are periodic, so recent money may not be included yet. ↳ FEC record H6OH15112(opens in a new tab)
Sources 15
- [1] Don Leonard (D) – OH-15 House 2026 | Smarter.Vote(opens in a new tab) Oct 10, 2026
- [2] 2026 Planned Parenthood Action Fund Endorsed Candidates(opens in a new tab) Oct 9, 2026
- [3] Could GOP troubles put Carey's seat in play? It'd take a giant blue wave(opens in a new tab) Oct 9, 2026
- [4] Voter Guide Profile for OH U.S. Rep., Dist. 15 candidate - Don Leonard(opens in a new tab) Oct 9, 2026
- [5] Meet the candidates in Ohio's 15th Congressional District ...(opens in a new tab) Oct 6, 2026
- [6] 'Do Something Democrat' Don Leonard hopes to flip the script in ...(opens in a new tab) Oct 5, 2026
- [7] Stand Up for Science Endorses Pro ...(opens in a new tab) Oct 2, 2026
- [8] 2026 Ohio District 15 U.S. House Election: Polls, Candidates, Money & Dates | Election.org(opens in a new tab) Sep 22, 2026
- [9] Congressional District 15 — Ohio Organizing Campaign(opens in a new tab) Sep 21, 2026
- [10] 2026(opens in a new tab) Sep 19, 2026
- [11] Largest Federal Employee Union Endorses Ohio Rep. ...(opens in a new tab) Sep 16, 2026
- [12] Largest Federal Employee Union Endorses Ohio Rep. ...(opens in a new tab) Sep 16, 2026
- [13] End Citizens United Endorses Don Leonard for Ohio's 15th ...(opens in a new tab) Jun 18, 2026
- [14] OH-15 Congressional Democratic Primary Candidate Don ...(opens in a new tab) Mar 6, 2026
- [15] Don Leonard — official campaign website(opens in a new tab)