Democrats win Congress and gain leverage over Trump’s foreign policy

Democrats captured both chambers of Congress after two years of Republican control, creating a new institutional check on Trump’s foreign policy. [5][6][7][8] They are expected to challenge the Iran war and could limit his use of tariffs against China; Vice-President JD Vance publicly blamed the war for the Republican defeat. [1][4][5] Why it matters: The consequences extend beyond Washington: congressional decisions could affect the continuation of the Iran war, duties on Chinese goods and Washington’s bargaining position before a US-China trade truce expires in January. Taiwan also faces uncertainty over a $14-billion weapons package that the administration has delayed for months. [1][5] Key insights: Trump launched the Iran war alongside Israel on February 28 without congressional approval; Democrats have repeatedly voted to require authorization or end the fighting. [5] | Vance’s statement blamed the war for the election result, but Trump defended the campaign while acknowledging its electoral cost. [4] | Fudan University’s Wu Xinbo says congressional limits on tariffs would reduce Trump’s leverage in negotiations with China. [1] | Iranian leader Mojtaba Khamenei warned on November 4 that changes in US party control would not change Washington’s conduct toward Iran. [10] Cheatsheet facts: What happened: Democrats won the House and Senate, ending two years of Republican control of both chambers. [5] | Why: Democrats campaigned against Congress surrendering its war-making and spending powers to Trump; Vance subsequently blamed the Iran war for Republican losses. [4][5] | The catch: The election is not an order ending the war: Trump defended the campaign, and the incoming Congress does not take shape until January. [4][10] | What's next: January brings both the reorganized Congress and the scheduled expiration of the US-China trade truce. [1][10]