Key Republican senators plan to reveal an update of their Obamacare repeal bill on Monday in the hopes of getting a vote on it by the end of the month.

Republican Sens. Bill Cassidy of Louisiana, Lindsey Graham of South Carolina, and Dean Heller of Nevada are proposing to block grant all federal healthcare dollars for the Medicaid expansion to states, along with funds equalling the value of Obamacare tax credits. The proposal has emerged as the only Obamacare repeal bill left standing after the Senate narrowly voted down a “skinny” repeal bill in late July.