In brief
A decisive Democratic victory in Congress could grant the party leverage over President Trump’s foreign policy, especially on Iran, trade tariffs and Ukraine support. Yet Trump’s veto power and a lack of a supermajority may blunt the pace of policy shifts, while European leaders watch the developing polarization with caution.
On Nov. 5, the U.S. midterm elections delivered a sweeping victory for the Democratic Party, handing Congress a majority that could significantly challenge President Donald Trump’s foreign policy agenda, particularly in the areas of Iran, trade, and Ukraine.
The Xinhua report notes that the new Democratic-controlled Congress is expected to increase scrutiny of Trump’s war against Iran, roll back some of his tariff measures, and push for stronger support for Ukraine. However, the president’s executive authority, veto power, and the absence of a congressional supermajority suggest that translating electoral gains into decisive policy changes will face hurdles.
Background on the Midterm Results
The 2026 elections marked a turning point in U.S. politics, with Democrats securing control of both chambers of Congress for the first time in several years. This shift follows a series of legislative battles and a polarization that has seen partisan divides impact both domestic and foreign policy outcomes. Trump has attributed part of the Republicans’ defeat to his decision to launch significant military actions against Iran, a claim that has kept the conflict in the political spotlight.
Potential Impact on Iran Policy
Democratic lawmakers have already taken steps to contain the administration’s approach to Iran. Rep. Jason Crow, a member of the House Armed Services Committee, told CBS News that lawmakers had voted on seven resolutions regarding the conflict, with two passing so far, and urged Congress to continue voting on such measures. The measure aims to limit or terminate unauthorized military operations, signaling a clear intent to exert legislative pressure.
“Lawmakers had already voted on seven resolutions concerning the conflict, with two passing so far, arguing that Congress should continue holding votes,” Crow said.
In addition, Senate Democratic Leader Chuck Schumer highlighted the “power of the purse” as a key lever for Congress. Schumer said that the incoming majority could use federal spending control to pressure Trump to end the war. He stressed that “the American people don’t know what the heck we’re fighting for in Iran.”
“The American people don’t know what the heck we’re fighting for in Iran,” Schumer told journalists, before adding that “the power of the purse is one of the ways of deterring a president who does war without the consent of the American people.”
While the war on Iran has already seen legislative attempts to curtail it, the absence of a supermajority limits the Democrats’ ability to force policy reversal outright. Trump’s veto power means that even if a measure is passed, the administration could still block it unless Congress can muster a two‑thirds majority, currently unavailable on key issues.
Trade and Tariff Revisions
Trump’s trade policy, marked by a suite of tariffs—especially on Chinese goods—has also come under renewed scrutiny. The Democrats, with their majority, are poised to roll back certain tariff provisions through new legislation or appropriations. However, the ongoing trade negotiations and global economic considerations suggest that a complete reversal of trade policy would require careful deliberation and bipartisan support, which is uncertain given existing intra‑party divisions.
Support for Ukraine
The Democratic influx of federal funds for Ukraine has been a key part of Trump’s foreign aid strategy. With the new Congress, lawmakers are expected to push for stronger and sustained support for Ukraine amid escalating tensions with Russia. The Democratic majority has signaled an intention to maintain pressure on Trump, ensuring that the Ukraine aid package remains robust.
Notably, European leaders have expressed cautious optimism that a stronger U.S. commitment to Ukraine could cement transatlantic ties. Yet the possible heightened polarization in Washington raises concerns about how quickly the U.S. can adapt its foreign policy stance on unpredictable international challenges.
In addition to these policy dynamics, an emerging question revolves around the speed and depth of potential policy shifts. Even as the Democrats are in a position to press for significant changes, the practical realities of congressional procedures, partisan politics, and executive checks create an environment where swift transitions are unlikely.
On the international stage, Germany’s Chancellor and the French President have suggested that they view the potential for stronger transatlantic ties as positive but note that the U.S. policy outlook must remain transparent to maintain trust. Reports indicate that European foreign policy officials are monitoring congressional developments closely, considering whether policy changes might affect collaborative security and economic agreements.
Ultimately, the 2026 midterm elections signal a shift toward more robust Democratic influence over U.S. foreign affairs. While the president’s veto power and a lack of a supermajority present constraints, the new Congress’s potential to shape policy on Iran, trade, and Ukraine, together with European leaders’ cautious optimism, casts a complex picture of the evolving U.S. global engagement.
