Confronted with poor primary performances in states with higher populations of low-income people, Democratic presidential candidate Bernie SandersBernie SandersThe Memo: Biden faces tough road on pledge to heal nation Clyburn: Biden falling short on naming Black figures to top posts Prepare for buyers' remorse when Biden/Harris nationalize health care MORE said his losses are due to those people not voting. 

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"Well, because poor people don't vote. I mean, that's just a fact. That's a sad reality of American society," Sanders said in an interview with MSNBC's "Meet the Press" set to air in full on Sunday. 

Host Chuck Todd had asked about rival Hillary ClintonHillary Diane Rodham ClintonTrump says he'll leave White House if Biden declared winner of Electoral College Federal workers stuck it out with Trump — now, we're ready to get back to work Biden soars as leader of the free world MORE's victory in 16 of 17 primary contests in states with the highest levels of income inequality. 

“If we can significantly increase voter turnout so that low-income people and working people and young people participated in the political process, if we got a voter turnout of 75 percent, this country would be radically transformed,” Sanders said. 

Sanders has often pinned his success rate to voter turnout. But he has lost among Democratic voters with household incomes below $50,000, 55 percent to 44 percent, across primaries where network exit polls have been conducted, according to The Washington Post.