Trump clashes with Senate Majority Leader John Thune over the filibuster and voter ID laws while four GOP senators break ranks on Iran; Congress passes the largest housing bill in decades targeting corporate home buying; Democratic socialist candidates backed by NYC Mayor Zohran Mamdani win major New York primary upsets, raising questions about the party's leftward trajectory heading into November's midterms. Trump's 4 a.m. social media posts repeatedly undercut Senate Republican strategy, forcing Majority Leader Thune to untangle legislative plans and manage internal party chaos.