Robert and Rebekah Mercer ranked among President Donald Trump's most influential backers in 2016. A representative for Priorities USA Action, a leading pro-Biden super PAC, said the organization wasn't underestimating Trump's reelection forces, Mercers or no Mercers. (Bossie, like former Trump campaign manager Corey Lewandowski and many others, has recently found himself back in Trump's favor.) The Cambridge Analytica data that the Trump campaign paid for was "so stupidly wrong" and a "complete joke," Spicer added. But sources familiar with the Mercers' political spending said they have no evidence that the Mercers are doing so.

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