Incumbent Democratic Sen. Jeff Merkley's commanding trader consensus at 92.5% stems from Oregon's strong Democratic lean, where no Republican has won a U.S. Senate seat since 1996, bolstered by his 2020 victory margin of 17 points and $5.9 million cash on hand. The March 10 filing deadline finalized a fragmented Republican primary field including state Sen. David Brock Smith—who announced March 3—and repeat nominee Jo Rae Perkins, lacking competitive fundraising. With May 19 primaries approaching, odds reflect skin-in-the-game assessments of weak GOP path-to-victory absent a national Republican midterm wave, Merkley scandal, or health issues that could unexpectedly mobilize turnout or independents.
Experimental AI-generated summary referencing Polymarket data · Updated
Democrat
93%

Republican
7%

Democrat
93%

Republican
7%
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, 5:04 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...Incumbent Democratic Sen. Jeff Merkley's commanding trader consensus at 92.5% stems from Oregon's strong Democratic lean, where no Republican has won a U.S. Senate seat since 1996, bolstered by his 2020 victory margin of 17 points and $5.9 million cash on hand. The March 10 filing deadline finalized a fragmented Republican primary field including state Sen. David Brock Smith—who announced March 3—and repeat nominee Jo Rae Perkins, lacking competitive fundraising. With May 19 primaries approaching, odds reflect skin-in-the-game assessments of weak GOP path-to-victory absent a national Republican midterm wave, Merkley scandal, or health issues that could unexpectedly mobilize turnout or independents.
Experimental AI-generated summary referencing Polymarket data · Updated



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