President Trump is confronting a crisis that is not bending to his narrative of a “pretty reasonable” new regime in Iran and all-but-assured victory for the United States.
For the fourth time since the war began, G.O.P. senators successfully fended off an effort to constrain the president. But there were signs of growing unease among Republicans.
Fresh off a two-week break, lawmakers returned to turmoil in the House, where legislation to reopen the Department of Homeland Security is stalled and the G.O.P. is struggling to keep its agenda on track.