The US House of Representatives passed a resolution limiting Trump's use of force against Iran, but it is not legally binding.

According to Mars Finance, on June 6th, the US House of Representatives recently passed a war powers resolution with 215 votes in favor and 208 against, demanding that President Trump halt military action against Iran without congressional authorization. Four Republican lawmakers defected, joining the Democrats in pushing the resolution through. However, because the House passed a "joint resolution," even if it is approved by the Senate, it has no legal force, and Trump is not obligated to comply. White House officials stated that such resolutions are inherently "unconstitutional," and Trump will continue to act based on his constitutional powers as Commander-in-Chief of the Armed Forces. Trump subsequently tweeted on Truth Social that the vote was "meaningless" and accused the Democrats who supported the resolution, along with the four Republican lawmakers, of attempting to undermine his power during negotiations to end the war with Iran. According to procedure, the resolution will be submitted to the Senate Foreign Relations Committee for consideration. It is worth noting that the Senate version is a legally binding joint resolution; if passed, it requires Trump's signature and is expected to be vetoed. Congress needs a two-thirds majority vote to override a presidential veto. Under the War Powers Act of 1973, the president can initiate military action for 60 days without congressional authorization, after which congressional approval is required. Trump wrote to Congress on May 1st stating that the war against Iran was "over," but legal experts believe that a ceasefire would not reset the time limit of the War Powers Act.