House Republicans were jubilant after muscling through President Donald Trump's "big, beautiful" tax and immigration package by a single vote. But across the Capitol, senators were more cautious.
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.
Republicans' aspirational deadline is July 4, ahead of a potential debt default . Thune said groups of senators had already been meeting to discuss the legislation and that they would want to take some time to review it. "And then we'll put our stamp on it," he said.
"We'll see how it goes," Thune said. "What does it take to get to 51?"
A look at a few of the potential sticking points in the Senate: