The measure would boost funding for border security and the Defense Department, eliminate taxes on tips and overtime, provide a new tax deduction to seniors and renew the 2017 tax cuts passed during the first Trump administration.

There are as many factions among Republicans in the upper chamber as in the House. Both chambers have to agree on the final product. It won’t be easy.

Senate Republicans say changes are coming for the sprawling domestic policy bill carrying President Trump’s agenda. Their colleagues who took political risks to push it through the House might not like them.