In this Jan. 26, 2017, photo, Sen. John McCain, R-Ariz., left, and Sen. Lindsey Graham, R-S.C., right, read the Wall Street Journal newspaper as they wait for President Donald Trump to speak at the House and Senate GOP lawmakers at the annual policy retreat in Philadelphia. McCain has emerged as Trump’s top Republican nemesis on Capitol Hill. Since Trump’s inauguration, McCain has broken with the president on his immigration order, warned him against any rapprochement with Moscow and lectured him on the illegality of torture. He supplied only a tepid endorsement of Rex Tillerson, Trump’s secretary of state nominee. (AP Photo/Pablo Martinez Monsivais)