Sen. Susan Collins (R-Me.) has been the only Republican who has publicly said she will vote against opening debate, but it remained possible she could be joined by other Republicans concerned about the form the legislation might ultimately take.
In an interview with Reuters on Monday, Collins said Trump has not reached out to her. The president pressured another potential holdout at a West Virginia event late Monday, calling out the state’s Republican senator, Shelley Moore Capito.
In the event of a tied vote, Vice President Mike Pence, who is expected to be on Capitol Hill on Tuesday, would cast the deciding vote.