The Senate remained in session through the night, voting on a long series of amendments, part of the arcane process Republicans are using to bypass Democratic objections under Senate rules that normally require 60 of the chamber's 100 members to agree on legislation.

In the pre-dawn hours, the lawmakers voted 99-1 to strip out a 10-year federal moratorium on state regulation of artificial intelligence, which supporters had promoted as a way to free innovation from a panoply of differing requirements.

Trump's Republicans hold a 53-47 Senate majority and the struggle to pass the bill has laid bare divides within the party over debt. The bill would also cut Medicaid and some food assistance programs for low-income Americans to partly offset the cost of the tax cuts.

"They're still trying to get a resolution on the vote, and we'll probably have an hour delay, because they've got to get all the technical corrections right," Republican Senator Thom Tillis told reporters.

--Reuters--