- No Hormuz Agreement95%
- Hormuz Agreement; D Senate3%
- Hormuz Agreement; R Senate2%
Kalshi prices Republican Senate control at 76% as midterms approach
New prediction market data shows a high probability for continued Republican control of the Senate, while the Strait of Hormuz remains closed amid ongoing conflict.
- Kalshi markets price the likelihood of Republicans winning the Senate at 76% as of Oct. 16 1.
- No Hormuz Agreement leads at 95% on Polymarket, which also prices 3% and 2%.
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Sources cited above
1 reference- 1kalshi.com — Which party will win the U.S. Senate? 2026 Senate Control Odds & Predictions | Kalshi
The story so far
written Oct 16What is happening
Control of the U.S. Senate and the stability of global maritime trade depend on the outcome of the 2026 midterm elections and stalled negotiations to reopen the Strait of Hormuz 15. Republicans currently hold a 53-47 Senate majority 1. A FiftyPlusOne forecast as of Oct. 15 projects a final result of 53 Republican seats to 47 for Democrats 3. However, Oct. 15 polling shows Democrats leading in Iowa and Minnesota 8, and a Pew Research survey found 46% of the public predicting a Democratic flip of the chamber 4.
No Hormuz Agreement leads at 95%▲ on Polymarket 18. The market also prices 3% and 2% 18. The Council on Foreign Relations reported on Oct. 15 that U.S. and Iranian forces have resumed strikes in a struggle for control of the maritime choke point 5.
What to watch
Read the full brief · how we got here
How we got here
The Strait of Hormuz has been a site of active conflict since a mid-June ceasefire collapsed 5. Iranian and Omani negotiators finalized a draft deal in August that would reportedly give Iran control of inbound traffic in exchange for reopening the waterway 910. While U.S. and Iranian officials discussed a phased deal to end the U.S. blockade as recently as Sept. 24, the waterway remains closed six months into the conflict 1112.
References · 10
- 1polymarket.com — 2026 Midterm Elections predictions & odds | Polymarket
- 3270towin.com — FiftyPlusOne Senate Forecast - 270toWin
- 4pewresearch.org — Majority of Americans Expect Democrats to Win Control of House; Public Is Split on Senate | Pew Research Center
- 5cfr.org — The Strait of Hormuz: A U.S.-Iran Maritime Flash Point | Council on Foreign Relations
- 8forbes.com — Hottest 2026 Midterm Races—Democrats Lead In Iowa, Minnesota In New Polls (Updated Daily)
- 9apnews.com — Iran and the US say a Strait of Hormuz deal is close, but one or both would have to back down
- 10reuters.com — Proposed Hormuz deal would give Iran control of inbound traffic, sources say | Reuters
- 11reuters.com — US and Iran discuss phased deal to reopen Hormuz and ...
- 12apnews.com — Diplomats from Iran and Oman meet as Strait of Hormuz remains closed 6 months into Iran war | AP News
- 18polymarket.com — Who wins the Senate pending Hormuz Agreement by Oct 23?
Timeline
1newest firstWhen we started following: U.S.-Iran tensions persist in Strait of Hormuz as Republicans hold Senate edge 18 days before midterms
The Strait of Hormuz remains a site of U.S.-Iran conflict following the collapse of a mid-June ceasefire 5. While Iranian and Omani negotiators finalized a draft deal in August to reopen the waterway 9, the Council on Foreign Relations reported on Oct. 15 that the two countries have resumed strikes in a struggle for control of the maritime choke point 5.
In the 2026 midterm cycle, Republicans currently hold a 53-47 Senate majority 1. A FiftyPlusOne forecast as of Oct. 15 projects a consensus outcome of 53 Republican seats to 47 for Democrats 3. However, Oct. 15 polling shows Democrats leading in Iowa and Minnesota 8, and a Pew Research survey found the public divided, with 48% expecting Republicans to keep the Senate and 46% predicting a Democratic flip 4. Polymarket currently prices 95%▲, followed by 3% and 2%.