New signs of strain were bubbling up among Republicans on Wednesday after three GOP lawmakers sided with Democrats on a vote to end the Iran war, Politico reported.The war has grown more unpopular among Americans as gas prices soar and Republicans consider the economic fallout ahead of the midterm elections, according to Politico. The 49-50 vote on Wednesday was the closest the Senate has come to having a war powers vote as the Trump administration has missed the legal deadline to tamp down its military operation, "which several Republicans have signaled would be a turning point for their support."Sen. Lisa Murkowski (R-AK) supported the resolution, joining Sen. Rand Paul (R-KY) and Susan Collins (R-ME). Sen. John Fetterman (D-PA) broke with Democrats again to oppose the vote."Paul has supported all seven attempts to rein in Trump, while Collins broke ranks for the first time last month, just ahead of the 60-day benchmark," Politico reported.Sen. Tim Kaine (D-VA) told Politico before the vote that he expected Republicans to oppose the war sooner, but that was not the case. Many Republicans have "still opted not to cross Trump, a sign of his continued sway over the bulk of the party." But Kaine and Sen. Jeff Merkley (D-OR), the resolution's co-sponsor, think that GOP lawmakers could be pressured by the economy to change their minds."We know what our colleagues are hearing. We know what they’re hearing from their constituents, and we’re starting to hear doubt creep into their words," Kaine told Politico. "There will be a day — and it might be soon, I believe — where the Senate will say to the president, ‘stop this war.’"