Some Republicans oppose the Corker "trigger" in tax plan

Sen. Chuck Grassley arrives at the Capitol in Washington. Photo: J. Scott Applewhite / AP

Republicans are starting to argue against the fiscal trigger being added to the Senate GOP tax plan to appease concerns from members — including Sens. Bob Corker, James Lankford and Todd Young — who don't want to blow up the deficit as a result of overhauling America's tax code.

Why it matters: An effort to win over some holdouts on the tax plan is alienating other lawmakers on both the House and Senate side, potentially jeopardizing plans for a vote tomorrow in the upper chamber. The GOP can only afford to lose two votes, but it's still unclear whether concerned members would actually vote against a bill that includes the trigger.