Bernie Sanders slams Hillary Clinton's event with George Clooney

Bernie Sanders is not happy with Hillary Clinton's upcoming fundraiser featuring actor George Clooney and his wife, attorney Amal Clooney.

"It is obscene that Secretary Clinton keeps going to big-money people to fund her campaign," Bernie Sanders said in a recent CNN interview.

SEE MORE: George Clooney endorses Clinton -- 'the only grown-up in the room'

The event in question is a planned fundraiser between the star couple and Clinton. A pair of seats at the head table are going for as much as $353,400.

See more of Clooney through the years:

Clooney, who's long been rumored to be considering a political run of his own, has been outspoken in his support for Clinton.

"I think the world of her, and I would be very happy if she were president," Clooney told Fusion.

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It's a far cry from the kind of fundraising Sanders' campaign takes in — thousands of small-money donations.

His campaign is funded almost 100 percent by campaign donations. On the other hand, more than one-fourth of Clinton's donations have come from super PACs and other groups.

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Sanders is coming off a three-state sweep over the weekend, and the two candidates are now turning their attention to Wisconsin's primary. A recent Emerson poll showed Clinton with a 6 percent lead in the state.