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Florida Gov. Rick Scott’s has built a behemoth fundraising operation in his bid to unseat Sen. Bill Nelson (D-FL), including the backing of a super PAC, New Republican PAC, that reported having more than $7 million in contributions in the second quarter.

But two contributions in the PAC’s latest quarterly fundraising report could cause more headaches than they’re worth. They reveal financial support for Scott’s Senate bid by a doctor and former health executive with a long and controversial history, involving allegations of kickbacks, financial conflicts of interest, and tens of millions of dollars in settlements with U.S. Justice Department.