How many Republican House Incumbents will not win their Primary?: What It Means & How It Resolves

What you need to know

This market asks how many sitting Republican members of the U.S. House of Representatives will fail to win their own party's primary in 2026, meaning they lose the chance to run as the Republican nominee in the general election. A 'Yes' for the 4-6 bucket means somewhere between four and six Republican incumbents get knocked out before the general election even happens. It is not about the general election itself, only the internal party nomination contests that happen first. The market settles based on a count of Republican House incumbents who do not come out as winners of their nominating contest between March 1 and September 30, 2026. This includes incumbents who lose a primary vote, but also anyone who officially registered as a candidate and then withdrew or dropped out for any reason. Incumbents who simply choose not to run at all and never register are not counted. The final count is confirmed once the Associated Press, Fox News, and NBC all call the relevant races, or, if they disagree, official state results are used. None of the provided news headlines are relevant to this market. They cover unrelated topics like AI policy and a Democratic primary in Michigan. To follow this market, the developments worth watching would be announcements of primary challengers targeting Republican incumbents, any incumbent announcing they will not seek reelection, and results as state primaries begin in spring 2026. The market strongly favors the 4-6 range at 86%, so the main uncertainty is not really which bucket wins but whether something unusual happens to push the number outside that range. Primary upsets are hard to forecast this far out because challenger fields are still forming, redistricting can reshape races, and national political dynamics shift. An incumbent dropping out after registering would count too, which adds an unpredictable human element. The long primary calendar, running through September, means the final number accumulates slowly over many months.

The odds right now

4-6+6.3 pts (1w)86%
>15-13.9 pts (1w)5%
10-12-0.1 pts (1w)5%
≤3-8.3 pts (1w)5%
7-9-14.0 pts (1w)4%
13-15-14.0 pts (1w)3%

Price history

4-6

86%+14.7%

How this resolves

The 2026 midterm elections are scheduled to be held on November 3, 2026, with congressional primaries running from March through September. This market will resolve according to the number of Republican House incumbents who do not win their nominating election to move on to the general election as a result of the 2026 midterm primary elections. Read the full resolution rules on the live market page.

4-686%
>155%
10-125%
≤35%
7-94%
13-153%

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