House and Senate leaders are broadly aligned on the tax bill and have been meeting regularly to avoid points of conflict. But Senate Republicans made clear the compromise, a product of frenzied last-minute negotiations, must be negotiated again after it passed the House by a single vote on Thursday.

Clearing the House is just the first hurdle for the bill, which will also have to pass muster with a Senate Republican conference that is telegraphing changes ahead.

The House spent weeks in painstaking negotiations to be able to pass President Donald Trump’s “one big, beautiful bill” early Thursday morning. Now, Senate Republicans are preparing to put it through a buzzsaw.