Sen. Susan Collins Susan Margaret CollinsGraham: GOP will confirm Trump's Supreme Court nominee before the election Gardner signals support for taking up Supreme Court nominee this year Tumultuous court battle upends fight for Senate MORE (R-Maine) said Wednesday she has received a commitment from Senate GOP leadership to include ObamaCare funding in a must-pass bill.

Collins said she got a promise from Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellGraham: GOP will confirm Trump's Supreme Court nominee before the election Trump puts Supreme Court fight at center of Ohio rally The Memo: Dems face balancing act on SCOTUS fight MORE (R-Ky.) that the deal crafted by Sens. Lamar Alexander Andrew (Lamar) Lamar AlexanderGraham: GOP will confirm Trump's Supreme Court nominee before the election The Hill's Morning Report - Sponsored by Facebook - Washington on edge amid SCOTUS vacancy This week: Supreme Court fight over Ginsburg's seat upends Congress's agenda MORE (R-Tenn.) and Patty Murray Patricia (Patty) Lynn MurrayTrump health officials grilled over reports of politics in COVID-19 response CDC director pushes back on Caputo claim of 'resistance unit' at agency The Hill's Morning Report - Sponsored by The Air Line Pilots Association - Pence lauds Harris as 'experienced debater'; Trump, Biden diverge over debate prep MORE (D-Wash.) would be included in legislation this year.

"I do from the majority leader, and so we're working out the details of that," Collins told reporters after a closed-door caucus lunch when asked if she had a deal to pass Alexander-Murray.

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Pressed if the commitment was to include it in a must-pass bill before the end of the year, she added: "Yes."

"[The government funding bill] is certainly a possible vehicle but obviously there needs to be some discussions with the House," she said.

Collins said she is still undecided on if she will ultimately support the tax plan during a final passage vote expected this week, but will vote to start debate on Wednesday.

Asked if the ObamaCare payments would only get included if she votes "yes" on the tax legislation, or if the bill passes, Collins noted that she's having "ongoing negotiations" with McConnell, the Senate Finance Committee and the administration "on a host of issues."

Spokesmen for McConnell didn't immediately respond to a request for comment about the agreement.

Collins has been pushing for lawmakers to pass Alexander-Murray, which provides two years of ObamaCare cost-sharing reduction payments, as well as her legislation with Sen. Bill Nelson Clarence (Bill) William NelsonDemocrats sound alarm on possible election chaos Trump, facing trouble in Florida, goes all in NASA names DC headquarters after agency's first Black female engineer Mary W. Jackson MORE (D-Fla.) that would provide funding for "reinsurance" programs aimed at bringing down premiums.

Passing both bills, Collins argues, is necessary after a repeal of ObamaCare's individual insurance mandate was included in the tax bill. She noted that the Collins-Nelson measure is also part of the deal.

"I still would prefer that the individual mandate [repeal] were not in the bill. ... It complicates this whole issue and when you pull one piece of the Affordable Care Act out it has an impact on premiums and that's why Alexander-Murray and Collins-Nelson are so important," she said.

Republicans added the individual mandate repeal to the bill amid pressure from conservatives and the Trump administration to use the tax bill to dismantle at least part of ObamaCare.

The Congressional Budget Office (CBO) said earlier this month that repealing the individual mandate would result in an additional 13 million people becoming uninsured by 2027.

CBO Director Keith Hall said in a letter sent to Murray on Wednesday that her legislation with Alexander would do little to make up for premium increases or coverage losses if the mandate is repealed.