The Republican-controlled House passed a massive tax cuts and spending package, sending it to President Donald Trump’s desk after a tense 24 hours of negotiations and arm-twisting.

The mostly party-line vote caps an arduous process that lasted more than four months, rife with ideological clashes and acrimony between the House and Senate, where Republicans had little margin for error given their narrow majorities. It also marks the GOP’s biggest legislative accomplishment since taking control of Washington at the start of the year.