With Sens. Rand Paul and Thom Tillis opposed to the package, GOP leaders can afford only one more defection. And multiple Republicans aren't yet sold on the measure.

Senate Republicans hope they are hours away from passing their massive tax and immigration bill. But the outcome is far from certain.

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.