Sen. Lisa Murkowski Lisa Ann MurkowskiGraham: 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-Alaska), a key vote for Senate Republicans in their pursuit of tax reform, will vote for the tax legislation, according to a reporter with MSNBC.

Alaska's Sen. @lisamurkowski will vote YES on the GOP tax bill, her office tells me. — Garrett Haake (@GarrettHaake) November 29, 2017

Murkowski earlier this month came out in support of repealing ObamaCare's individual mandate as part of the tax-reform bill, despite previously voting against repeal-and-replace bills this year.

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Two lawmakers, Sens. Ron Johnson Ronald (Ron) Harold JohnsonThis week: Supreme Court fight over Ginsburg's seat upends Congress's agenda GOP set to release controversial Biden report Democrats fear Russia interference could spoil bid to retake Senate MORE (R-Wis.) and Steve Daines Steven (Steve) David DainesMcConnell locks down key GOP votes in Supreme Court fight Will Republicans' rank hypocrisy hinder their rush to replace Ginsburg? Toobin: McConnell engaging in 'greatest act of hypocrisy in American political history' with Ginsburg replacement vote MORE (R-Mont.), have come out against the bill, meaning Vice President Pence would need to break a tie should all other Republican senators support the legislation and all members of the Democratic caucus vote no.

Johnson has said he is “encouraged” by discussions on the bill, while an aide for Daines previously told The Hill that the senator is “optimistic” about changes to the legislation. Johnson did vote to advance the bill out of the Senate Budget Committee.

The Hill has reached out to Murkowski's office for comment.