Robert Mercer is donating $300,000 to a super PAC backing Kelli Ward, who is running against the GOP senator in a primary next year.
One of Donald Trump’s most generous political benefactors is providing a six-figure donation to a super PAC devoted to unseating Sen. Jeff Flake, an Arizona Republican who has been fiercely critical of the president.
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Top Trump donor ponies up to take out Flake - POLITICO
Robert Mercer is "the power behind Trump's throne"!