With Ohio's May 5 primaries just days away, prediction market traders reflect a razor-thin contest for the open-seat gubernatorial race on November 3, pricing Democrats at 51% and Republicans at 47.5% despite recent polls showing presumptive nominees Amy Acton (D) and Vivek Ramaswamy (R) essentially tied—48%-47% in the April 20 Bowling Green State University survey of 1,000 registered voters and 49%-44% in Echelon Insights' April 21 likely voter poll. Ramaswamy dominates the GOP primary at 76%, bolstered by endorsements from Donald Trump and JD Vance after rival Heather Hill's April 25 disqualification, while Acton leads Democrats decisively. The battleground state's volatility, midterm turnout uncertainties, and high-stakes fundraising keep odds glued near 50/50; primary outcomes, debates, or national shifts could tip the balance.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated$82,309 Vol.
$82,309 Vol.

Democrat
51%

Republican
48%
$82,309 Vol.
$82,309 Vol.

Democrat
51%

Republican
48%
A candidate shall be considered to represent a party in the event that he or she is the nominee of the party in question. Candidates other than the Democratic or Republican nominee (e.g., Greens, Libertarian, independent) may be added at a later date.
Candidates who run as independents will not be encompassed by the “Democrat” or “Republican” options regardless of any affiliation they may have with the party.
The resolution source for this market is the Associated Press, Fox News, and NBC. This market will resolve once all three sources call the race for the same candidate. If all three sources haven’t called the race in this state for the same candidate, this market will resolve based on the official certification.
Market Opened: Oct 13, 2025, 5:45 PM ET
Resolver
0x2F5e3684c...A candidate shall be considered to represent a party in the event that he or she is the nominee of the party in question. Candidates other than the Democratic or Republican nominee (e.g., Greens, Libertarian, independent) may be added at a later date.
Candidates who run as independents will not be encompassed by the “Democrat” or “Republican” options regardless of any affiliation they may have with the party.
The resolution source for this market is the Associated Press, Fox News, and NBC. This market will resolve once all three sources call the race for the same candidate. If all three sources haven’t called the race in this state for the same candidate, this market will resolve based on the official certification.
Resolver
0x2F5e3684c...With Ohio's May 5 primaries just days away, prediction market traders reflect a razor-thin contest for the open-seat gubernatorial race on November 3, pricing Democrats at 51% and Republicans at 47.5% despite recent polls showing presumptive nominees Amy Acton (D) and Vivek Ramaswamy (R) essentially tied—48%-47% in the April 20 Bowling Green State University survey of 1,000 registered voters and 49%-44% in Echelon Insights' April 21 likely voter poll. Ramaswamy dominates the GOP primary at 76%, bolstered by endorsements from Donald Trump and JD Vance after rival Heather Hill's April 25 disqualification, while Acton leads Democrats decisively. The battleground state's volatility, midterm turnout uncertainties, and high-stakes fundraising keep odds glued near 50/50; primary outcomes, debates, or national shifts could tip the balance.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
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