“I’d leave Lisa alone. She’s a member of our conference, and we want to keep it that way,” said Sen. John Thune (S.D.), the No. 2 Republican senator.

Asked about Trump’s tweet, Sen. John Cornyn (R-Texas), an adviser to Senate Majority Leader Mitch McConnell (R-Ky.), told reporters, “I don’t support that at all.”…

On Monday, two members of GOP leadership — Sens. Roy Blunt (R-Mo.) and John Barrasso (R-Wyo.) — pointed to Murkowski’s write-in campaign, signaling that she would likely be hard to beat in Alaska.

“She won a … write-in in her race. The last time that had happened was 1954,” Barrasso said. “She knows her state.”