House Republicans were jubilant after muscling through President Trump’s tax and immigration package by a single vote. But across the Capitol, senators were more cautious.

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.

U.S. Senate Republicans said on Thursday they will seek substantial changes to President Donald Trump's sweeping tax and spending bill after it narrowly won approval in the House of Representatives, in a sign that significant hurdles remain for the package.