In brief
The Democrats’ sweeping win in the midterm elections could give Congress greater leverage over President Trump’s foreign policy, especially on the Iran conflict, trade tariffs, and support for Ukraine. However, Trump’s veto power and the absence of a supermajority in either chamber may limit how quickly the new Congress can translate its electoral gains into policy change. European leaders are cautiously optimistic that stronger transatlantic ties may emerge, though polarization could still lead to an unpredictable U.S. foreign stance.
The 2026 U.S. midterm elections, held on November 5, resulted in a sweeping victory for the Democratic Party, which now controls both houses of Congress. The new composition of the legislature has the potential to shape President Donald Trump’s foreign‑policy agenda on a number of high‑profile issues that affect millions of people around the world.
One of the immediate areas of focus is the U.S. military engagement in Iran. Republican losses have sharpened scrutiny of Trump’s decision to launch the so‑called “war against Iran,” according to officials close to the president. The war has been blamed by some for Republican defeats, and Trump himself has admitted it partly cost the party in the elections, while still refusing to regret the action. The newly empowered Congress is expected to pursue war‑powers resolutions that could limit or terminate the conflict, and to use its control of federal spending to curb military funding for the operation. Senator Chuck Schumer, the Democratic leader in the Senate, told journalists 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.” Representative Jason Crow, a Democrat from Colorado and a member of the House Armed Services Committee, explained that lawmakers have already voted on seven war‑resolution proposals, with two passing, and that Congress should continue to hold such votes.
Trade policy is another arena where the new majority could assert influence. President Trump has imposed numerous tariffs as part of his trade strategy, and Democrats are expected to seek to roll back some of these taxes. The lack of a supermajority, however, means that any changes in tariff policy would need bipartisan support to survive the president’s veto. While the administration retains the power to overturn congressional recommendations, the new Democratic leaders may also employ the appropriations process to limit the budgetary space for certain trade measures.
Support for Ukraine remains a critical foreign policy priority. The Democratic majority is anticipated to push for stronger assistance to the country, in response to ongoing tensions on the Eastern European border. The new members of Congress will likely table additional funding for Ukraine and demand a more robust United States‑European alliance. European heads of government have expressed cautious optimism that the realignment could strengthen transatlantic ties, yet they warn that heightened polarization within Washington could still generate unpredictability in U.S. foreign policy.
Despite the Democrats’ electoral advantages, structural constraints remain. President Trump retains veto power, and a supermajority of 60 votes in each chamber would be necessary to override a presidential veto. The bipartisan division that persists in Capitol Hill limits the speed and depth of potential policy shifts, and the president’s executive authority can still create a lag between congressional intent and policy implementation. As a result, while the new Congress can now bring increased scrutiny and leverage to, example, the Iran conflict, trade tariffs, and Ukraine support, it may not achieve an immediate overhaul of the administration’s foreign‑policy posture.
In conclusion, the midterm election results have re‑balanced the U.S. political landscape by endowing Democrats with a powerful presence in Congress. Their newfound leverage offers a path for purposeful change to President Trump’s foreign policy decisions, yet the interplay of veto authority, the absence of a supermajority, and continued political polarization will shape the pace and efficacy of any transformation.
