Republicans in Congress confronted a yawning budget hole in their sprawling tax-cut and spending bill on Friday as they scrambled to rewrite dozens of elements that have been rejected by a nonpartisan referee.

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.

A look at some of the key provisions in Republicans' domestic policy bill and where the two chambers are divided.