In a sign of the dramatic turn in their relationship, during a flight back from South Carolina last week, the president turned to the South Carolina senator and asked if he’d like to take a helicopter back to the White House with him, offering Graham a guided tour.

“How can you not like that?” Graham said in a lengthy interview. “I mean I grew up in the back of a liquor store, first in my family to go to college. I never thought I’d be on Marine One with the president.”

Graham is transforming himself from one of Trump’s fiercest critics to his chief congressional translator, talking to the president sometimes multiple times in a day. He insists Trump is “growing into the job” and becoming more somber, a far different figure than who Graham once railed against as a long-shot presidential candidate. A White House official said that Graham’s alliance with Trump “is one of the best we have on the Hill.”