Flake. Corker. Romney. And now, Sen. Thom Tillis. The roll call of Republican senators in the U.S. Congress who have called it quits, rather than endure a political career sideways with President Donald Trump,

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.

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.