Senate Republicans narrowly approved President Donald Trump’s sweeping tax and spending cuts package Tuesday after a dayslong grind to secure the support of key holdouts.

Some of the hardest work may still lie ahead, however, as Trump and GOP leaders must now muscle the bill through the deeply divided House.

With the chamber set to return to Washington on Wednesday, Republicans expect Trump will need to lean heavily on the House GOP to back his plan. Weeks of bitter GOP infighting in the Senate culminated in a standoff with critical GOP swing votes, with leadership unable to win the support of Sens. Susan Collins of Maine, Thom Tillis of North Carolina and Rand Paul of Kentucky — despite last-minute changes to the legislation.

Vice President JD Vance was ultimately called in to break the legislative logjam and cast the tie-breaking 51st vote.

Both Senate Majority Leader John Thune and House Speaker Mike Johnson have been working furiously to deliver Trump his first major legislative win, so the president can sign it in a special ceremony on the Fourth of July.