The conservative Patriots Foundation alleges in a lawsuit being filed today in U.S. District Court for the District of Columbia that an improperly porous relationship among four Brock-founded organizations amounted to illegal coordination with the Clinton campaign in violation of Federal Election Commission regulations. The best known of the four groups is Media Matters for America, which highlights what it calls media bias from the right. The other three are the American Bridge 21st Century PAC; the American Bridge 21st Century Foundation; and the Correct the Record PAC.  

"American Bridge 21st Century PAC claimed that it was independent of the Clinton campaign so that it could make independent expenditures," the Patriots Foundation said in a statement provided to RealClearInvestigations. "American Bridge is run by the same people who run Media Matters and Correct the Record, however, which we know coordinated with the Clinton campaign.

"They all work from the same offices," the statement continued, "Brock was paid by all of them, American Bridge and Correct the Record shared at least 6 employees, and Correct the Record made in-kind contributions to American Bridge PAC. American Bridge's supposedly independent activity was just as coordinated as Media Matters' and Correct the Record's activity – meaning that American Bridge's [expenditures] were really excessive and illegal contributions to Hillary Clinton's campaign."

Representatives for the organizations did not respond to requests for comment (Correct the Record is now inactive).  Nor did Brock himself or the Clinton campaign.

This past April, the Patriots Foundation filed an FEC complaint against Brock's organizations. Since the agency hasn't acted on it within a requisite 120 days, the Patriots Foundation is now suing the FEC as allowed under campaign finance laws. The Patriots Foundation also filed complaints with the IRS last spring regarding Media Matters and the American Bridge Foundation, but there is no legal remedy to force the IRS's hand in court as with the FEC.