KEY POINTS
  • Senate Republicans are scrambling to remake their tax bill hours ahead of an expected vote.
  • A fiscal "trigger" designed to win over skeptical senators like Bob Corker will not be allowed under Senate rules.
  • Republicans are now looking at other ways to raise revenue and address the concerns of senators worried about budget deficits.

Senate Republicans rushed to patch up their tax bill Thursday only hours before an expected vote.

The Senate parliamentarian ruled Thursday that a fiscal "trigger," important to winning deficit-wary Sen. Bob Corker's support for the GOP plan, will not work under Senate rules. Republican senators are now looking to find new ways to address the concerns of Corker, a so-called deficit hawk Republican from Tennessee.