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,

GOP Sen. Thom Tillis was back on Capitol Hill on Monday as Senate Republicans struggled to pass their "One Big Beautiful Bill Act" he opposes -- before President Donald Trump 's July Fourth deadline.

Tillis, who is up for re-election next year in battleground North Carolina, voted against advancing a bill for Trump's domestic policy agenda Saturday evening.