Donald Trump Donald John TrumpHouse committee believes it has evidence Trump requested putting ally in charge of Cohen probe: report Vietnamese airline takes steps to open flights to US on sidelines of Trump-Kim summit Manafort's attorneys say he should get less than 10 years in prison MORE's campaign manager says "undercover" voters will give the Republican presidential nominee the edge in November's election.

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“The hidden Trump vote in this country is a very significant proposition,” Kellyanne Conway told Channel 4 in London earlier this week.

"Donald Trump performs consistently better in online polling, where a human being is not talking to another human being about what he or she may do in elections.

"It’s because it’s become socially desirable, especially if you’re a college-educated person in the USA, to say that you’re against Donald Trump," she said.

Conway said the campaign hopes an “undercover Trump vote” project that's now underway will provide an unbiased view of Trump's nationwide support.

"It’s a project we’re doing internally. I call it the 'undercover Trump voter,' but it's real and I think that if you go around this country and you talk to people, you see it’s real as well," she said.

Democratic presidential nominee Hillary Clinton Hillary Diane Rodham ClintonSanders: 'I fully expect' fair treatment by DNC in 2020 after 'not quite even handed' 2016 primary Sanders: 'Damn right' I'll make the large corporations pay 'fair share of taxes' Former Sanders campaign spokesman: Clinton staff are 'biggest a--holes in American politics' MORE is currently leading Trump by an average of 6 points in national polls.