The legislation, known as a war powers resolution, gives lawmakers an opportunity to demand congressional approval before any further attacks are carried out. The Senate resolution and a similar bill being voted on in the House later this week face unlikely paths through the Republican-controlled Congress and would almost certainly be vetoed by Trump even if they were to pass.
“War is ugly, it always has been ugly, but we're taking out a regime that has been trying to attack us for quite some time,” said Sen. Markwayne Mullin, an Oklahoma Republican.
Meanwhile, Sen. Lindsey Graham, a South Carolina Republican who has long pushed Trump to engage overseas, argued that the widening conflict represented an opportunity for Arab and European countries to join in the fight against Iran and the militant groups it supports.
“I don’t mind people being on record as to whether or not they think this is a good idea,” he told reporters, but also argued that too much power over the military was ceded to Congress in the War Powers Act, which mandates that presidents must withdraw troops from a conflict within 90 days if there is no congressional authorization.
Trump administration officials have been a frequent presence on Capitol Hill this week as they try to reassure lawmakers that they have the situation under control.
“We are not going to put American troops in harm’s way,” Secretary of State Marco Rubio told reporters in a news conference at the Capitol Tuesday.