With Brett Kavanaugh's Supreme Court seat in the bag, President Donald Trump on Monday accused the conservative jurist's alleged victims of playing part in a left wing "hoax" and claimed Democrats will suffer in the upcoming congressional midterms as a consequence.

Trump made the comments on the South Lawn of the White House before departing for Florida, effectively walking back previous assertions that he considered at least one of Kavanaugh's accusers "very credible."

"The way they really tortured him and his family, I thought it was a disgrace," Trump told reporters. "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."

Democratic candidates running in next month's midterms will pay a price for their "dishonesty," Trump said.

"I think you're going to see a lot of things happen on Nov. 6 that would not have happened before," the president said. "I think a lot of Democrats are going to vote Republican."

Trump claimed the Democrats have shifted so far to the left that, if they flip Congress, "we'll end up being Venezuela."

Trump's denunciations of Kavanaugh's accusers stand in sharp contrast to comments he made after Christine Blasey Ford testified before the Senate Judiciary Committee last month.

Then, Trump called the California professor "a very credible witness" after she testified in excruciating detail about how Kavanaugh allegedly tried to rape her at a drunken party while they both attended high school in the early 1980s.

"I thought her testimony was very compelling," Trump said.

Two other women have also publicly accused Kavanaugh of sexual assault.

"It was all made up, it was fabricated, and it was a disgrace," Trump said Monday of Julie Swetnick, who alleges Kavanaugh was present when she was drugged and gang raped at a high school party.

Kavanaugh, 53, who has consistently denied the accusations, was confirmed by the Senate on a historically thin 50-48 margin last week, cementing a conservative majority on the high court that will likely last decades.