Tillis warned that Trump and congressional Republicans are about to “make a mistake on health care and betraying a promise” if the GOP’s budget megabill passes. The legislative package would extend Trump’s signature tax cuts from his first term, while slashing funding to government programs including Medicaid.

Trump on Saturday lashed out at Tillis, warning that he was making a “BIG MISTAKE” and calling him “a talker and complainer, NOT A DOER!” He celebrated the news of his retirement on Sunday night, but has not yet reacted publicly to the senator’s speech.