Sen. Joe Manchin on Thursday was confronted by a protester who demanded to know if he planned on voting to confirm Supreme Court nominee Brett Kavanaugh.

Manchin (D-W.V.), up for re-election in November in a state won by President Trump by more than 40 points, hasn't announced how he plans on voting.

A video posted to Twitter shows a woman approaching Manchin at the Hart Senate Office Building and pressing him on the Kavanaugh vote.

MUST SEE: Two-Year-Old Girl Helps Dad Learn 'Pledge of Allegiance' for Citizenship Test

“Why are you going to vote 'yes' on this,” the protester asked Manchin.

“How do you know how I’m going to vote?” Manchin responded.

When the woman asked him how he's going to vote, Manchin said, “No, I’m not going to tell you."

“How are you not listening to survivors?” the protester pressed.

As he got on an elevator, Manchin said he is listening to survivors, but he can't say how he's going to vote.

"How long is it gonna take you to listen to us?" she said as the doors closed.

Kavanaugh's confirmation has been thrown into doubt after a series of women came forward with decades-old sexual assault allegations.

Numerous lawmakers -- including Senate Majority Leader Mitch McConnell (R-Ky.) and Sen. Bill Cassidy (R-La.) -- have also been confronted in recent days by protesters, some linked to left-wing activist groups.

McConnell Offers Forceful Defense of Kavanaugh: Nobody Is 'Guilty Until Proven Innocent' in This Country

'What Evidence Is There?': 'F&F' Hosts Challenge Dem Sen. Coons on Kavanaugh Opposition

Video of Man Who Looks Just Like President Trump Goes Viral