Sen. Bernie Sanders Bernie SandersJacobin editor: Primarying Schumer would force him to fight Trump's SCOTUS nominee Trump campaign plays up Biden's skills ahead of Cleveland debate: 'He's actually quite good' Young voters backing Biden by 2:1 margin: poll MORE (I-Vt.), a 2016 Democratic presidential hopeful, on Sunday took a jab at the Koch brothers over their support of Wisconsin Gov. Scott Walker, who dropped out of the GOP race last week.

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Sanders said money controls politics, despite the well-funded Walker's exit from the race.

"I wish the Koch brothers would say, ‘Well, gee, now we can take the $900 million that we planned to spend in this campaign supporting right-wing Republicans… and we’re not going to spend it,’” Sanders said on CBS’s “Face the Nation” on Sunday. “But, John, I’m not sure that the Koch brothers learned that lesson.”

The self-identified Democratic socialist took Jeb Bush to task for saying people vote for “free stuff.”

“Well, let’s be clear that what Jeb Bush is proposing are massive tax breaks for the richest people in this country, while he will fight to cut social security and Medicare and programs that tens of millions of elderly people and middle-class people and working-class people depend upon,” Sanders said.

“I happen to believe, John, that in a democratic, civilized society, all people should be entitled to healthcare as a right – yeah, I do believe that.”

Bush had described the Democratic Party platform as buying voters with "free stuff."

Sanders also called for public colleges and universities to be tuition free and said the wealthy will have to pay “substantially more in taxes.”