A group of Republican senators are working to convince their colleagues to support their last-ditch effort to gut Obamacare.

The four senators behind a plan to provide Obamacare funding to states through a block grant met with the Republican conference Thursday as part of a luncheon. The meeting is among a series of opening moves the senators are making to muster support from 46 other Republicans before a deadline at the end of the month. The senators were happy to receive more support from GOP leadership for the proposal.