Billionaire distressed asset investor Wilbur Ross has explained his reasons for backing Donald Trump to be the next U.S. president, highlighting the presumptive Republican nominee's lack of political correctness and attention to middle-class America. "Part of the reason why I'm supporting Trump is that I think we need a more radical, new approach to government – at least in the U.S. – from what we've had before," Ross told CNBC on Wednesday.

"I think the reason why the Trump phenomenon has become so important … is because middle class and lower middle class America has not really benefited by the last 10 to 15 years of economic activity and they're sick and tired of it and they want something different."

He also said that this demographic was "sick and tired of political correctness," something that the outspoken Trump could never be accused of, having polarized U.S. voters with his divisive comments on women and minorities.

Campaign pitches are 'symbolic'

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Ross said that Trump's approach to politics was refreshing. "His direction will be a less politically-correct direction," he said. "There is nothing in the direction that he is pointing that is different from the Republican platforms."

"You only get to vote for who's on the ballot paper and your choices are between Hillary Clinton and Donald Trump, and I find that an easy choice to make," he said.

Ross conceded that Trump's pledge to wipe out $19 trillion of American debt in two terms – a claim made during an interview with the Washington Post in April – was somewhat fantastical, saying that some of Trump's math when it came to this economic ambition "probably doesn't work."

"If you add up all the promises any politicians makes, the math doesn't work. Hillary Clinton's math doesn't work, Donald's math probably doesn't work. I think you have to listen to their campaign pitches more as symbolic, more as metaphors."

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