US President Donald Trump said that it was "an insult to the American public" for Democrats to consider impeaching Supreme Court Justice Brett Kavanaugh and predicted that Republicans would benefit at the polls following the chaotic confirmation process.
Boarding the Marine One helicopter at the White House ahead of a trip to Florida, he branded the sexual assault allegations that threatened to derail Mr Kavanaugh's path to the top court "a hoax" and "all made up, fabricated".
Last week, the Federal Bureau of Investigation completed a report on sexual misconduct allegations against Mr Kavanaugh - but the findings have not been released to the public.
Then, just as his confirmation seemed inevitable, 11th-hour allegations emerged that Kavanaugh sexually assaulted a 15-year-old girl while at high school and exposed himself to a female classmate at an alcohol-fueled dorm party at Yale University.
During this historic Supreme Court justice swearing in-cum-Dem-smackdown, Trump said "In our country a man or a woman must always be presumed innocent unless and until proven guilty" adding, "And with that, I must state that you sir, under historic, scrutiny were proven innocent".
It also comes in the final run-up to midterm elections on November 6.
Ceremonial swearing-ins are unusual for new justices.
The ceremony is scheduled to begin at 7 p.m.in the White House's East Room. "Folks who feel very strongly one way or the other about the issues in front of us should get out and vote and participate".
All eight Supreme Court justices attended the reception, along with the Republican members of the Senate Judiciary Committee. He said the high court "is not a partisan or political institution" and assured he took the job with "no bitterness".
"False charges. False accusations", the president said at a convention for police chiefs in Orlando.
He called the Kavanaugh row "a disgraceful situation brought about by people who are evil", and said that the result was "very exciting". Outside groups are culling an unusually long paper trail from his previous government and political work, with the National Archives and Records Administration expected to release a cache of millions of documents this month.
Now that Mr Kavanaugh is confirmed, the nine-justice court, which rules on constitutional questions, is expected to take a more reliably conservative approach.
After being announced on stage, Mr Kavanaugh thanked President Trump "for everything".