Democratic presidential hopeful Bernie Sanders Bernard (Bernie) SandersSenate Dems seek to turn tables on GOP in climate change fight Bernie Sanders Town Hall finishes third in cable news race, draws 1.4 million viewers Woman to undecided Biden: 'Just say yes' to 2020 bid MORE said in an interview aired Sunday that he would not accept help from super-PACs if he were to face presumptive Republican presidential nominee Donald Trump Donald John TrumpREAD: Cohen testimony alleges Trump knew Stone talked with WikiLeaks about DNC emails Trump urges North Korea to denuclearize ahead of summit Venezuela's Maduro says he fears 'bad' people around Trump MORE in November.

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Sanders was asked on CBS’s “Face the Nation” how he would compete with “the billions of dollars on the other side.”

“The Republicans and the Koch brothers and Sheldon Adelson and all these billionaires will pour a whole lot of money into the campaign,” he said. “We have done incredibly well so far in terms of fundraising. By appealing to the middle class and working class of this country, we have gotten almost 8 million individual campaign contributions. Twenty-seven [dollars] on average. That is what I will do in a general election.”

Sanders said he would expect his contributions to increase fivefold in a general election match-up.

“I will win this campaign when you have 8, 10 million people contributing 25, 30 bucks, who are involved in the process,” he said. “Who are prepared to take on the big super-PACs and the billionaires who will fund Trump's campaign.”

Sander said he will continue to depend on the middle class.

“An incredible number of small individual campaign contributions is how we'll fund our campaign, and it is how we will win the national election.”