When a justice dies or resigns, the Constitution gives the president the authority to nominate a replacement.
It’s the job of the Senate to investigate the candidate’s qualifications. The Senate also votes to confirm or reject the nominee.
First the Senate Judiciary Committee will hold hearings. During these sessions, Kavanaugh, a 53-year-old federal judge, will answer senators’ questions. The committee will then vote on whether to send his nomination to the full Senate for a vote.
A simple majority among the 100 senators is all that’s needed to confirm a nominee. Republicans hold 51 seats. That means they could confirm Kavanaugh without any Democratic votes under current rules. (Democrats hold 47 seats, and two independents caucus with them.)
For many years, 60 yes votes were required for confirmation. In 2017, Senate Republicans changed the voting rules. They made the change to facilitate the confirmation of Neil Gorsuch, President Trump’s first Supreme Court nominee.