Justice Brett Kavanaugh became the newest associate justice of the Supreme Court when he was sworn in Saturday evening.

On Tuesday morning, he will sit to the left of Justice Elena Kagan, in the most junior spot on the high court's bench, and will hear arguments in three criminal cases before the court.

Here's a quick look at some key information about Kavanaugh as he begins his lifetime appointment to the court.

Updated at 11:31 p.m. ET

A sharply divided Senate — reflecting a deeply divided nation — voted almost entirely along party lines Saturday afternoon to confirm Judge Brett Kavanaugh to the U.S. Supreme Court.

A little more than two hours later, Kavauangh was sworn in during a private ceremony as protesters stood on the court's steps.

Updated at 8:41 p.m. ET

Brett Kavanaugh's nomination to the Supreme Court cleared a key procedural hurdle in the Senate on Friday, and his confirmation now seems all but certain, after a key swing vote, Sen. Susan Collins, R-Maine, declared her support in a speech on the Senate floor.

Moments after Collins completed her remarks, Sen. Joe Manchin, D-W.Va., announced in a statement that he too will support the nomination when it comes up for a final vote.

That final vote is expected as soon as Saturday.

Updated at 10:12 p.m. ET

Judge Brett Kavanaugh issued a mea culpa of sorts on the eve of a key Senate vote that could determine whether or not he reaches the Supreme Court, admitting in an op-ed that his testimony last week forcefully defending himself from sexual assault allegations "might have been too emotional at times."

Most of the Twitter accounts that spread disinformation during the 2016 presidential campaign remain active now, according to an ambitious new study released on Thursday.

Knight Foundation researchers examined millions of tweets and concluded that more than 80 percent of the accounts associated with the 2016 disinformation campaign are still posting — even after Twitter announced back in July that it had instituted a purge of fake accounts.