Republicans in the U.S. Senate are working to revise President Donald Trump's sweeping tax and spending bill after a nonpartisan referee ruled that some elements do not comply with the complex rules they are using to bypass Democrats' objections.

Top Senate Republican John Thune has the difficult task of keeping his 53-member majority in line, as they use a parliamentary maneuver to bypass unified Democratic opposition to Trump's "One Big Beautiful Bill Act," which would extend his 2017 tax cuts and boost spending on border security and the military.

The Senate parliamentarian has advised a key Medicaid provider tax overhaul that's central to President Donald Trump's big tax cut and spending bill does not adhere to procedural rules.