Sen. Susan Collins Susan Margaret CollinsMcConnell locks down key GOP votes in Supreme Court fight Most Americans think winner of election should pick next Supreme Court justice: poll Murkowski: Supreme Court nominee should not be taken up before election MORE (R-Maine) said Wednesday that it was "disappointing" a bipartisan health-care effort was halted after the White House threw its support behind a measure pushed by Sens. Lindsey Graham Lindsey Olin GrahamMcConnell locks down key GOP votes in Supreme Court fight Will Republicans' rank hypocrisy hinder their rush to replace Ginsburg? Momentum growing among Republicans for Supreme Court vote before Election Day MORE (R-S.C.) and Bill Cassidy William (Bill) Morgan CassidyCoushatta tribe begins long road to recovery after Hurricane Laura Senators offer disaster tax relief bill Bottom line MORE (R-La.).

In an interview with CNN, Collins said she had not yet decided whether she will vote for the Graham-Cassidy bill, which seeks to end federal ObamaCare insurance subsidies and Medicaid expansion and replace them with block grants to states.

Collins said she is waiting for the Congressional Budget Office to release a partial analysis of the Graham-Cassidy bill before she makes a decision on it.

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But she acknowledged that she preferred an effort by the top Republican and Democrat on the Senate Health Committee to stabilize the individual insurance market and fix the problems with ObamaCare, rather than repeal it outright.

Sen. Lamar Alexander Andrew (Lamar) Lamar AlexanderMcConnell locks down key GOP votes in Supreme Court fight Alexander backs vote on Trump Supreme Court nominee: What Democrats 'would do if the shoe were on the other foot' Toobin: McConnell engaging in 'greatest act of hypocrisy in American political history' with Ginsburg replacement vote MORE (R-Tenn.), chairman of the Health Committee, said Tuesday that the efforts had come to a standstill after Democrats and Republicans were unable to reach a deal that could pass in the Senate.

"It's disappointing that this bipartisan effort — which should be our approach — was not allowed to proceed to conclusion," Collins said.

In addition to Collins, Sens. Lisa Murkowski Lisa Ann MurkowskiMcConnell locks down key GOP votes in Supreme Court fight Most Americans think winner of election should pick next Supreme Court justice: poll Murkowski: Supreme Court nominee should not be taken up before election MORE (R-Alaska) and John McCain John Sidney McCainMomentum growing among Republicans for Supreme Court vote before Election Day McConnell urges GOP senators to 'keep your powder dry' on Supreme Court vacancy McSally says current Senate should vote on Trump nominee MORE (R-Ariz.) are also said to remain undecided on the Graham-Cassidy bill. The three Republicans voted against a slimmed-down ObamaCare repeal bill in late July, throwing a wrench in the GOP's efforts to do away with the health-care law.

Sen. Rand Paul Randal (Rand) Howard PaulSecond GOP senator to quarantine after exposure to coronavirus GOP senator to quarantine after coronavirus exposure The Hill's Morning Report - Sponsored by National Industries for the Blind - Trump seeks to flip 'Rage' narrative; Dems block COVID-19 bill MORE (R-Ky.) has already indicated he will not vote for the Graham-Cassidy bill, arguing that it does not go far enough to repeal ObamaCare