Corker initially suggested that GOP Sen. Ron Johnson (Wis.), the chairman of the Homeland Security and Governmental Affairs Committee, could emerge as a check on Trump’s foreign policy. He later later told reporters that he would try to think of who could fill the space.
Sen. Chris Coons (D-Del.) over the weekend said there were five Republicans who he could potentially see stepping up: Sens. Marco Rubio (Fla.), Todd Young (Ind.), Cory Gardner (Colo.), Ben Sasse (Neb.) and Thom Tillis (N.C.).
Coons, in an interview with The Washington Post, didn’t explain his thinking for each of the five. But Rubio has been outspoken about Trump’s deal with Chinese telecommunications firm ZTE; Gardner and Young are members of the Foreign Relations Committee; Tillis co-sponsored legislation protecting special counsel Robert Mueller; and Sasse often sounds off in frank terms against the administration.