April 23 (UPI) -- Senate Republicans have again blocked the Democrats from curbing President Donald Trump's ability to wage war with Iran, as negotiators try to find a diplomatic end to the conflict during the fragile cease-fire.

The Senate voted 51-46 on Wednesday afternoon against Sen. Tammy Baldwin's War Powers Resolution, the fifth time since March 4 that the Senate has voted against directing the removal of U.S. Armed Forces from hostilities with Iran until authorized by Congress.

As with previous votes, Wednesday's was mostly along party lines with Republican Sen. Rand Paul of Kentucky again voting with his Democratic colleagues, and Democratic Sen. John Fetterman of Pennsylvania again voting with the Republicans.

"This entire war has been unnecessary, illegal and unwise. And we need to put a check on this president before it gets even worse," Baldwin said from the Senate floor on Wednesday.

"Unfortunately, the president has shown us that he did not have a plan after day one. The president said the war would be over in a matter of days; we are coming up on the two-month mark with no real end in sight. And over the course of 50-plus days we have seen nothing short of a disaster."