Washington (CNN) Three Republican senators have weighed in on postponing a vote on Brett Kavanaugh's Supreme Court nomination until they hear more from the woman accusing Kavanaugh of sexual assault.

Sens. Jeff Flake and Bob Corker both say the Senate Judiciary Committee should not vote on Kavanaugh's nomination until they talk to his accuser, and Sen. Lisa Murkowski said the committee might have to consider delaying the vote, according to reporting by CNN and other news organizations.

When asked if the committee should consider delaying the vote this week, Murkowski told CNN, "Well, I think that might be something they might have to consider, at least having that discussion. This is not something that came up during the hearings. The hearings are now over, and if there is real substance to this, it demands a response. That may be something the committee needs to look into."

Senate Republicans hold a 51-49 majority and cannot afford two or more Republicans voting against Kavanaugh's nomination unless they pick up votes from Democrats. Alaska's Murkowski and Maine Republican Sen. Susan Collins are two key GOP swing votes.

Collins told CNN on Sunday that she was "very surprised" by the now-public allegations, but did not know enough to make a judgment. She said she raised the allegations during a phone call with Kavanaugh on Friday before the accuser went public over the weekend.

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