Jeffrey Thompson, the businessman under federal investigation for allegedly financing a $653,000 shadow campaign on behalf of Mayor Vincent Gray, reportedly did the same for at least seven other politicians.

The Washington Post has the scoop from unnamed sources.

Thompson boosted the mayoral campaign of Linda W. Cropp, a Democrat, seven years ago with more than $100,000 in alleged illegal spending, the people said. He allegedly spent smaller amounts on behalf of former council member Michael A. Brown and the insurgent council candidacies of Patrick D. Mara, a Republican, and Mark H. Long, an independent, in 2008. And he allegedly spent still more in 2010 for council hopefuls Jeff Smith and Kelvin Robinson, both Democrats, and in 2011 for council member Vincent B. Orange (D-At Large).

Cropp and Mara denied knowledge of the alleged illicit funding to the Post, while others didn’t return or declined to comment. Cropp told the paper Thompson was a “good fundraiser” for her mayoral campaign.

The Post also reported that field organizer Vernon Hawkins is discussing a plea deal with Ron Machen, the U.S. Attorney for District of Columbia. NBC4 confirmed that Hawkins is nearing the end of these negotiations and may plead guilty to his role in the Gray shadow campaign this week.

Two Thompson associates, Philadelphia businessman Stanley Straughter and ex-Thompson employee Lee C. Calhoun, have pleaded guilty in recent months to involvement in a “straw donor” scheme. Thompson was not named in either case.