U.S. President Donald Trump faces a deadline on Friday to end the Iran war or make the case to Congress for extending it, but the date is most likely to pass without altering the course of a conflict that has lapsed into a standoff over shipping routes.Ending the war appears highly unlikely.Instead, analysts and congressional aides said they expect Trump to notify Congress that he plans a 30-day extension or disregard the deadline, with his administration arguing that a current ceasefire with Tehran marked an end to the conflict.Like most policies in a bitterly divided Congress, war powers have become…