The Senate is expected to stay in session all night Friday as senators brace for a final vote Saturday afternoon on Brett Kavanaugh's Supreme Court nomination.

The Senate voted 51-49 earlier Friday to advance Kavanaugh's nomination. Under the chamber's rules, senators have an additional 30 hours to debate his nomination before a final vote takes place.

Senators are expected to burn up the 30 hours of debate by staying up all night to give speeches on Kavanaugh's nomination from the Senate floor.

The rare all-night session comes as Kavanaugh appears to be a lock for confirmation.

Republicans have a narrow 51-seat majority, meaning they can afford to lose one GOP senator before they needed help from Democrats.