Jeff Flake. Bob Corker. Mitt Romney. And now, Sen. Thom Tillis of North Carolina. The roll call of Republican senators who have called it quits rather than endure a political career sideways with President Donald Trump is long and apparently,

The North Carolina Republican had already made up his mind to leave the Senate, but the run-in with the president over Medicaid moved up the timeline of the announcement.

Senate Majority Leader John Thune said Tillis gave him a heads-up he would retire: “It’s unfortunate, and it’s something he’s been thinking about for a while and he just finally decided that was the best decision for him and his family,” he told POLITICO.