Donald Trump has claimed sexual assault allegations against his newest Supreme Court Justice were a "hoax".
Brett Kavanaugh was sworn in to the Supreme Court on Saturday and will take part at a second ceremony at the White House later.
The event is likely to be marked by protests after thousands of people marched in Washington DC in opposition to his nomination.
Mr Trump defended his candidate at a rally in Kansas at the weekend, and has now dubbed the sexual assault claims, made by two women including Christine Blasey Ford, as a "hoax".
As he boarded a plane to Florida, Mr Trump told reporters: "I've been hearing that… now they're thinking about impeaching a brilliant jurist, a man that did nothing wrong, a man that was caught up in a hoax that was set up by the Democrats using the Democrats lawyers and now they want to impeach him.
"I've heard this from many people. I think it's an insult to the American public."
Ahead of the US mid-term elections, Mr Trump added: "I think you're going to see a lot of things happen on 6 November that would not have happened before.
"The American public has seen this charade, has seen this dishonesty by the Democrats and when you mention 'impeach' a justice of the United States Supreme Court who was a top scholar, top student, top intellect and who did nothing wrong."
Justice Kavanaugh – who vehemently denies the sexual assault allegations against – is due to take his seat in the Supreme Court on Tuesday to hear arguments about longer prison terms for repeat offenders.
He is also scheduled to take part in an "unusual" televised appearance with the president, sources told the Associated Press, but Mr Trump has flown to Florida for a trip.
Before his defence of Justice Kavanaugh, Mr Trump said he would not be firing Rod Rosenstein, the deputy attorney general, over claims in the New York Times that he questioned the president's fitness for office.
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Mr Rosenstein has denied the report as "factually incorrect" and Mr Trump has decided to keep him in his post.
The pair spoke for 30 minutes on Air Force One as they both flew to Orlando to address police chiefs from around the world. It is one of the longer times they have been able to speak together since the allegations emerged.