The number of House Republicans vowing to oppose the Senate version is enough to block the bill’s passage, though past standoffs have been resolved after successful pressure campaigns by the president and party leaders. Given Republicans’ thin 220-212 majority, only three House Republicans need to join Democrats in opposing the bill to sink it.

The debate within President Donald Trump's Republican Party over a massive tax-cut and spending bill returns to the House of Representatives on Wednesday, as party leaders try to overcome internal divisions and meet a self-imposed July 4 deadline.

The House previously passed a version of the legislation in May, but it’s unclear if House GOP members can pass a Senate-refined version of the bill on Wednesday.