Washington (CNN) Bernie Sanders failed Sunday to explain the logic behind his analysis that he was losing to Hillary Clinton because "poor people don't vote" when confronted with the fact that the poorest voters support her, according to exit polls. He also said his remaining path to win the nomination is not easy.

Sanders had said on NBC's "Meet the Press" that he was trailing Clinton for the nomination because "poor people don't vote. I mean, that's just a fact. That's a sad reality of American society. And that's what we have to transform."

But when CNN's Jake Tapper noted that exit polls show Clinton wins 55% of voters making less than $50,000 to Sanders' 44%, Sanders pivoted his argument.

"One of the reasons I am running for president of the United States is to try to revitalize American Democracy. It is not a secret that we have one of the lowest voting turnout rates of any major country on Earth," Sanders told Tapper on "State of the Union" Sunday. "And it is also true that in the last general election we had in 2014, 63% of the American people didn't vote. And the numbers were worse for low-income people and the numbers were worse for young people."

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