So far, President Donald Trump has suggested he’d support the bill, but he hasn’t thrown his full weight behind it.

McConnell has told senators he would bring up the bill if it had 50 votes, and under fast-track rules he could do so at any time before Sept. 30. That’s the end of the government’s fiscal year, when the rules expire and the GOP would have to start over.

Several Holdouts

Republicans can only lose two votes in the 52-48 Senate and still pass the measure, with Vice President Mike Pence’s tie-breaker. There are at least four holdouts, and getting any of them to back the measure would require the senators to change their past positions. Pence, who would cast the potentially deciding vote, will return to Washington from New York Tuesday, where he’s been taking part in United Nations General Assembly events, to attend Senate GOP lunches.

Republican Rand Paul of Kentucky said Monday he’s opposed to the Graham-Cassidy bill, saying it doesn’t go far enough. John McCain of Arizona said he’s “not supportive” yet, citing the rushed legislative process.

Two other Republicans -- Susan Collins of Maine and Lisa Murkowski of Alaska -- have voted against every repeal bill considered this year in the Senate, citing cuts to Medicaid and Planned Parenthood as well as provisions that would erode protections for those with pre-existing conditions. The Graham-Cassidy bill contains similar provisions on those three areas.

"I’m concerned about what the effect would be on coverage, on Medicaid spending in my state, on the fundamental changes in Medicaid that would be made," Collins told reporters Monday evening.

She said that Maine’s hospital association has calculated the state would lose $1 billion in federal health spending over a decade compared to current law.

"That’s obviously of great concern to me," she added.

Hard Sell