A proposal to deter states from regulating artificial intelligence for a decade was soundly defeated in the U.S. Senate on Tuesday, thwarting attempts to insert the measure into President Donald Trump’s big bill of tax breaks and spending cuts.

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.