Senate Majority Leader John Thune can afford to lose three Republican senators and still pass the bill, and there are more than that, right now, who have problems with it. Like the House, he will have to balance the concerns from moderate and conservative members of his conference.

The tax cut package that passed the U.S. House and President Trump has dubbed the "big, beautiful bill" may change before it becomes law.

More than 7 million people will lose Medicaid coverage over the next 10 years if the bill becomes law, according to the Congressional Budget Office.