Brett Kavanaugh was sworn in as 114th Supreme Court justice Saturday, hours after the Senate voted 50-48 to confirm him.

The quick swearing-in enables Kavanaugh to begin work immediately in advance of arguments at the court Tuesday.

The court says Kavanaugh took the oath required by the Constitution and another for judges that is part of federal law in the same room where the justices meet for their private conferences.

The 53-year-old justice’s wife, children and parents were in attendance.

Chief Justice John Roberts administered the constitutional oath and retired Justice Anthony Kennedy administered the judicial one. Kavanaugh is replacing Kennedy on the bench and once served as his law clerk.

Earlier in the day, the street outside the Supreme Court was the scene of anti-Kavanaugh protests that led to dozens of arrests.

President Trump beamed over Kavanaugh’s confirmation as he belittled the demonstrators.

“I applaud and congratulate the U.S. Senate for confirming our GREAT NOMINEE, Judge Brett Kavanaugh, to the United States Supreme Court,” he tweeted.

Ahead of a Saturday night rally in Kansas, he stated, “The crowd in front of the U.S. Supreme Court is tiny, looks like about 200 people (& most are onlookers) – that wouldn’t even fill the first couple of rows of our Kansas Rally, or any of our Rallies for that matter! The Fake News Media tries to make it look sooo big, & it’s not!”

Tuesday’s two Supreme Court cases involve prison sentences for repeat offenders.

With News Wire Services