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Joe Ricketts and his crew of top-dollar GOP donors are causing a bit of a political furor in Iowa.

A super PAC founded by the Nebraska native and TD Ameritrade founder recently launched a $600,000 media blitz against Democratic presidential candidate Bernie Sanders.

The twist is that Democrat Hillary Clinton and her supporters believe the ad is intended to help – not hurt – Sanders. They argue that Ricketts and his fellow wealthy Republican donors want Sanders to win the Democratic nomination because they believe Clinton would be harder to defeat in the fall election.

Brian Baker, a spokesman for Ricketts' super PAC known as ESA, said Clinton was simply wrong.

Baker said the super PAC was concerned about Sanders’ rise in the polls and decided the time had come to educate Iowa voters on Sanders’ record.

The super PAC launched its media campaign earlier this week. The Iowa caucuses will be held Monday.

“The way we see it, Senator Sanders is far and away the front-runner. And, just as people are starting to educate people about Senator Clinton’s record, we felt it was a good time to educate people about Senator Sanders’ record,” Baker said.