Trump this week came down firmly in favor of House Republicans' plan for a single sweeping bill, which includes extending $4.5 trillion in tax cuts. House Republicans have a narrow and fractious 218-215 majority, which will make passing that bill difficult.

The U.S. Senate wrangled long into the early hours of Friday morning on a Republican bill to advance President Donald Trump's priorities on immigration, energy and defense, even after he urged lawmakers to scrap the effort in favor of a House of Representatives bill that would include trillions of dollars in tax cuts.

Now the onus is on House Republicans to build enough support to advance their own party-line plan, or face pressure to back the Senate’s slimmer vision.