A spokeswoman for Collins didn't immediately respond to a request for comment about the senator's planned remarks.

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The timeline means Collins will have to cast an initial vote this morning on whether to end debate on Kavanaugh's nomination before her position is known.

The Senate is scheduled to hold a vote to end debate on Kavanaugh's nomination at 10:30 a.m.

It wouldn't be the first time Collins has supported a nomination during a procedural hurdle and then later voted against the nominee.

Senate Republicans hold a 51-49 majority in the chamber.