


Democratic candidate for U.S. House in Ohio
General Election
Voters choose the office holder.
Current prediction-market probability for the candidate, updated as market prices change.
Don Leonard is trading at 17% to win the OH-15 House winner? on prediction markets.
Key details about the candidate’s background, party, office sought and current campaign.
Current roleProfessor (city and regional planning)
PartyDemocratic
Political ideologyProgressive Democrat
LocationOhio
BackgroundProfessor (city and regional planning)
EducationCornell University — PhD, Government (2014)
Notable personal detailsDon Ralph Leonard is a Democratic candidate for the U.S. House in Ohio’s 15th Congressional District in the 2026 election cycle. He has worked as a Professional Practice Assistant Professor in City and Regional Planning at The Ohio State University. Leonard previously held postdoctoral fellowships at Tulane University and Princeton University and earned graduate degrees in government from Cornell University. He also served in the U.S. Peace Corps in South America.
Supports restoring economic fairness by strengthening safety nets and opposing tax breaks and bailouts for corporations and billionaires while prioritizing policies that help working families. Emphasizes bold national action on healthcare, housing, childcare, and aging as central to fixing the economy.
The candidate supports that all Americans deserve quality, affordable insurance and emphasizes strengthening healthcare access. His campaign materials state a focus on affordable, usable insurance rather than proposing full privatization or single-payer replacement.
Supports accountability for aggressive immigration enforcement and criticizes federal agents’ conduct; frames immigration as an issue tied to humane treatment and reform rather than enforcement-first approaches. Emphasizes protecting legal residents from abusive enforcement actions while discussing immigration and ICE accountability as part of his platform.
Don Leonard is being mentioned in the context of Democrats expanding their 2026 target list for House races. The DCCC has added more Republican-held districts to its map as it looks to capitalize on voter frustration over the economy. The summary does not provide any specific new action or statement from Leonard himself.
Recent polling results and the candidate's current average in the race.
Don Leonard currently averages 38.0%, ranking second in this race, 4.0 points behind the next candidate.
Average recalculated from polls through Jun 23 - 25.


Aggregation source: FiftyPlusOne
Campaign finance totals from the latest available reporting period.
2026
LatestCycle 2026
Source: FEC