JD Vance says Iran war cost Republicans control of Congress

US Vice President JD Vance Wednesday blamed the war in Iran for Republicans’ sweeping losses in the 2026 midterm elections, saying the conflict had cost the party control of Congress. “The reason we lost is the war,” Vance wrote in a lengthy post on X, adding that any honest discussion about the party’s future must begin with the conflict.

He also pointed to President Donald Trump’s remarks acknowledging that the war had played a role in the Republican setback. Vance’s comments came after Democrats won control of both the Senate and the House of Representatives, delivering a major rebuke to Trump and his party.

The results set up divided government for the final two years of Trump’s presidency, with Democrats poised to increase scrutiny of the administration and challenge its legislative agenda. The vice president gave four reasons many of his and Trump’s 2024 voters backed Democrats this time.

“The reason we lost is the war. The president himself said so last night.” JD Vance, post on X, November 4, after Democrats won control of both chambers Vance called the conflict the central reason Republicans lost, saying an honest post-election discussion must start there.

Vance said voters wanted the administration to focus more on affordability and rising prices. Vance said some 2024 Trump-Vance voters switched to Democrats, wanting the administration to put America first. Vance identified calls to change the US relationship with Israel as another factor in voters’ decisions.

Sources: JD Vance, post on X, via CBS News; CBS News; NBC News; The Hill; US Defense Department, via CBS News. In his post, Vance argued that Republicans had turned out to vote, but that some voters who supported Trump and Vance in 2024 switched to Democrats in Tuesday’s election.

He cited the Iran war, the cost of living and inflation, the “America First” agenda and the US relationship with Israel as key issues shaping voters’ decisions. The vice president also challenged Republicans to consider whether the political cost of the war had been worth it.

“If you'd like to argue it was worth it, that losing the Senate for the next 6 years was worth it, then do so,” Vance wrote. “Argue it was a worthwhile cost to pay. Agree or disagree, that's at least honest.” One of the things the data analysts on our side obsessed over was "composition"—whether the electorate looked close enough to 2024 for Republicans to win.

And despite polls that showed a Democrat blowout, the data kept on telling us the same story: in some states turnout was merely OK, in other states it was downright amazing, and in no state was it catastrophic. There was a genuine sense of optimism on our team: our people were showing up.

So, I asked the smartest data guy I know, does that mean we're going to shock the world? "No," he told me. "We might do better than the polls suggest. But the data is telling us that a lot of Trump/Vance 2024 voters are pissed and planning to vote for the other guys.

Our voters are turning out, but they may not vote for us." Well, that looks prophetic now. Our voters did show up. In Florida, for example, the electorate was 9 points more Republican than Democrat, just a couple points worse than 2024.

Undoubtedly there were places we could have done better on turnout. But the main problem is not turnout. The main problem is that many people who voted for Trump/Vance in 2024 voted for Democrats in 2026.