The midterm results are in. Democrats have won control of both the House and the Senate. The wave was wide. Texas elected a Democrat to the Senate for the first time since 1932. Democrats won the Texas governorship, with Gina Hinojosa defeating Greg Abbott. James Talarico, a Democrat running in a Texas congressional district, beat the Republican incumbent Ken Paxton. In Georgia, Ohio, and Maine, Senate races broke Democratic. Hakeem Jeffries has formally launched a bid for the speakership of the House. For the first time since 2018, Congress will not be governed by the party that occupies the White House.
JD Vance said, the following morning, that 'the real reason we lost is obvious to almost everyone.' That reason was the Iran war. Vance said pollsters had told him that many voters who backed Trump in 2024 had switched to Democrats in 2026 because they were angry. He stopped short of calling the war a mistake, but he did not stop short of naming it as the cause of the defeat. His statement was notable for its candour and for its implication: that a significant portion of the Republican coalition had decided the Iran war was not what they had voted for in 2024.
Trump's response was to call Vance's assessment 'largely true' and immediately defend the decision to go to war. He said he would have done nothing differently. He said preventing Iran from getting a nuclear weapon was 'the only answer' in the long term. This is a consistent position. It is also a position that, as of Tuesday night, lost the Senate and the House.
An ABC News poll of House voters provides some texture. Thirty-four per cent of voters said the Iran war was crucial to their vote. That is a substantial figure, below the 55 per cent who cited government corruption and the 49 per cent who cited the cost of living, but large enough to explain the margins in competitive districts. The war is not the only reason Democrats won. It is, as Vance himself acknowledged, the reason Republicans lost by as much as they did.
The practical consequences of a Democratic Congress are limited in the short term. Democrats lack the two-thirds majority needed to override a presidential veto. Trump retains full command authority over the Iran operation, which he launched without congressional authorisation last February. When the government-funding bill expires on December 11, Democrats will have leverage over spending, but analysts are clear that cutting off funds while troops are deployed is politically and legally treacherous. The War Powers Resolution is unlikely to constrain a president who has already demonstrated his willingness to ignore it.
What Democrats can do is investigate. They will chair every committee in both chambers from January 3. The likely targets include defence secretary Pete Hegseth's handling of the war, the Trump family's business interests, and what members have already called the 'unauthorised and unconstitutional' decision to strike Iran. The word impeachment has been used. Whether it goes anywhere is a separate question, but the inquiry will begin the moment the new Congress is sworn in.
The results also carry a message for every government that has lined up behind Washington's Iran policy. America's closest allies absorbed the political cost of endorsing a war that an American electorate then repudiated. What those governments do with the new congressional arithmetic — whether they press harder for a diplomatic settlement or simply wait to see what Trump does next — will be one of the defining tests of allied foreign policy in the months ahead.
What happened on November 4 was not simply a verdict on the Iran war. It was a verdict on the assumption that a wartime electorate does not change its mind. The 2026 midterms showed that it does, particularly when the war in question is expensive, unresolved, and was started without asking. Trump said he would do it again. The voters who gave Democrats the House and the Senate have noted his answer.
