WASHINGTON (AP) — The Senate slogged through a tense overnight session that dragged into Tuesday, with Republican leaders searching for ways to secure support for President Donald Trump’s big bill of tax breaks and spending cuts while fending off proposed amendments, mostly from Democrats trying to defeat the package.

The revised package now heads back to the House, where Republican leaders are hoping to approve it and send it to Trump before a self-imposed July 4 deadline. But it faces hurdles.

Party leaders were able to muscle through considerable internal rifts, but the bill’s fate in the House was uncertain.