The Republican-led Senate on Wednesday rejected the latest Democratic attempt to halt President Donald Trump's war in Iran, turning aside a resolution that would require the U.S. to withdraw forces from the conflict until Congress authorizes further action.The 47-52 vote was the fourth time this year that the Senate has voted to cede its war powers to the president in a conflict that Democrats say is illegal and unjustified. Republicans say they will keep faith in Trump's wartime leadership, for now, citing Iran's nuclear capabilities and the high stakes of withdrawal. But GOP lawmakers are also anxious for the conflict to end — and they may not defer to the executive branch indefinitely.Some Republicans have already made clear that they are eyeing future votes that could become an important test for the president if the war drags on.Under the War Powers Act of 1973, Congress must declare war or authorize use of force within 60 days of its start — a deadline that will arrive at the end of this month. The law provides for a potential 30-day extension of that deadline, but lawmakers have made clear that they want the administration to soon lay out a plan for the end of the conflict.After the 60-day or 90-day deadline, "it's time to fish or cut bait," said Republican Sen. Thom Tillis of North Carolina."I think that the administration would be wise to put together what would look like a well-founded authorization of military force and a funding strategy," Tillis said.Sen. Lisa Murkowski, R-Alaska, has been talking to colleagues about putting together a resolution that would authorize the war beyond that time period. Republican Sens. John Curtis of Utah and Susan Collins of Maine have also said they would like to see congressional action.