“The question we have to ask is, why are these people pouring millions of dollars into your campaign?” said Sanders. “They are not dumb. They do not throw their money around for no reason.”

Much of Sanders’ speech was spent attacking the nation’s wealthiest political donors, with the Koch brothers singled out specifically.

“Democracy is not about billionaires buying elections,” he said, then shouted to a round of cheers: “That’s not democracy, that is oligarchy!”

He vowed that as president, any nominee to the Supreme Court would have to promise “loud and clear” to vote to overturn the Citizens United case.

Sanders got some of his biggest cheers from the audience of mostly young people by slamming federal anti-marijuana laws that categorize the drug in the same way as heroin.

“You can argue the pluses and minuses of marijuana, but it ain’t heroin,” Sanders said, to thunderous cheers. He then stressed that they should stay away from heroin.

Most analysts believe Clinton’s string of wins in “Super Tuesday” state primaries this week, and polling numbers in soon-to-vote states, all but guarantee her the Democratic nomination — though Sanders isn’t mathematically out of it yet.

The Illinois and Missouri presidential primaries are March 15.

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