How many Republican Senators not running in 2026?: how this market works

What you need to know

This market is asking how many Republican U.S. Senators will step aside rather than run for reelection in 2026 — meaning they retire, quit to run for a different office, or simply never file to run again. In 2026, a specific group of Senate seats are up for election (senators serve 6-year terms, so only roughly one-third of seats come up each cycle). This market only counts Republicans among that group who choose to walk away from their Senate seat instead of seeking another term. The market settles on the final count of Republican senators — from the group whose terms end in January 2027 — who don't try to keep their seat. It counts retirements, switches to other races (like running for governor), and anyone who simply never files paperwork to run. The market won't officially settle until after every state's candidate filing deadline passes, which is expected by late August 2026. The source will be credible news reporting, not an official government count. None of the news headlines provided are relevant to this market. They don't mention Senate retirements or Republican senators making decisions about 2026. The key developments to watch for would be individual Republican senators publicly announcing they won't seek reelection, or news that a senator is planning to run for a different office — like governor or another position — in their state in 2026. The count isn't fixed — it grows or shrinks as individual senators make personal decisions over many months, and those decisions can be unpredictable. A senator might hint at retiring, then change their mind. Others might jump into a governor's race late. The market currently leans toward 7, with 11 also getting meaningful weight, which shows genuine disagreement. Senators also sometimes delay announcements strategically, so the picture stays murky right up until filing deadlines close.

The odds right now

• 7-1.5 pts (1w)31%
• 11-2.5 pts (1w)19%
• 9+17.8 pts (1w)19%
• 10+4.2 pts (1w)7%
• 8-11.7 pts (1w)6%
• 5-0.1 pts (1w)6%
• 12+-1.1 pts (1w)2%
• 6-0.9 pts (1w)2%
• <5-0.1 pts (1w)1%

Price history

How this resolves

Resolves August 31, 2026

The 2026 U.S. general elections for Congress are scheduled to be held on November 3, 2026. Read the full resolution rules on the live market page.

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