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Donald Trump walked off mid-interview yesterday when he was asked about being a "racist".

A local NBC reporter put the allegation to the Republican billionaire, who is weeks away from discovering if he'll become US President.

Three minutes into her interview in Ohio, Colleen Marshall said: "You've been labelled a racist, you've been labelled a sexist".

Trump immediately started to walk off, muttering: "Thank you very much."

But she pursued with the question: "How do you respond to that?"

Mr Trump turned and said pointedly: "I am the least racist person you've ever met."

He then immediately left the interview without saying goodbye.

(Image: AFP/Getty Images) (Image: REUTERS)

The clash exposed tensions after Mr Trump's terse final Presidential debate with Democrat Hillary Clinton.

Last night the pair sparred at a New York charity dinner - where they "roasted" each other with more light-hearted jokes.

Mrs Clinton told the well-heeled audience: "Donald looks at the Statue of Liberty and sees a four.

"Maybe a five, if she loses the torch and tablet and changes her hair.”

(Image: AFP/Getty Images)

(Image: AFP/Getty Images)

She added: “I am so flattered that Donald thought I use some sort of performance enhancer. Actually I did – it’s called preparation.”

Mr Trump, meanwhile, proved he could poke fun at himself after all.

He said: “Michelle Obama gives a speech and everyone loves it, it’s fantastic.

"My wife Melania gives the exact same speech and people get on her case. I don’t get it.”

The joke was a response to claims his wife had ripped off whole passages of a speech by the First Lady years before.