Asked about the clip – which shows Giuliani in a faked “interview” with an attractive and flirtatious young woman – while speaking to journalists aboard Air Force One, Trump said “I don’t know what happened”.

“But years ago, you know, he tried to scam me. And I was the only one who said no way. That’s a phony guy. And I don’t find him funny.”

Trump said the incident happened about 15 years ago, meaning he was likely referring to Baron Cohen’s 2003 interview with him while playing Ali G, where the wannabe gangster pitches his latest business venture to Trump – special gloves for eating ice cream.

“To me, he was a creep,” Trump said.

While the plot of the new Borat film is under wraps, word of Baron Cohen’s latest outrageous ambushes on unsuspecting participants has spread like wildfire.

On Wednesday Giuliani issued an angry denial after being tricked into a fake hotel room “interview” with a young woman.

In the film, the encounter appears to leave the 76-year-old former New York mayor in a highly compromising situation, caught with his hands down his pants in the bedroom.

Giuliani said Wednesday the scene was “a complete fabrication”.

“I was tucking in my shirt after taking off the recording equipment. At no time before, during, or after the interview was I ever inappropriate,” he tweeted.

“If Sacha Baron Cohen implies otherwise he is a stone-cold liar.”

Trump made the comments after taking off from Pensacola, Florida on his way to West Palm Beach.

The Republican president, former reality TV star and real estate mogul launched an intense last-ditch reelection push Friday in Florida.

Polls show him well behind Democratic challenger Joe Biden ahead of the Nov 3 presidential election.