An advocacy group founded by longtime Hillary Clinton Hillary Diane Rodham ClintonJeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Momentum growing among Republicans for Supreme Court vote before Election Day Warning signs flash for Lindsey Graham in South Carolina MORE ally David Brock has filed a complaint with the Federal Election Commission accusing Donald Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE of using his presidential campaign to “personally enrich himself and his family.”

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The complaint, obtained by The Hill, was filed Thursday by the American Democracy Legal Fund.

“Donald Trump is making a mockery of our electoral system with these blatant violations of FEC law," the fund's president Brad Woodhouse said in a statement. "Trump is using his run for office to fatten his wallet and promote his businesses, not to solve problems for American families. Donald Trump isn’t interested in ‘Making America Great Again’ because he’s too focused on making the Trump brand great again."

Citing press conferences in which he has referenced Trump-brand products and properties, the group accuses the likely Republican presidential nominee of “using funds from his presidential campaign to further his business and personal interests.”

Trump was widely criticized for giving a press conference at his golf course in Turnberry, Scotland, just hours after the United Kingdom voted to leave the European Union. While speaking with reporters, he predicted that a falling pound would bring more business to the golf course.

The group also pounced on an Associated Press report earlier this month that $6.2 million of the campaign’s expenditures have gone to companies owned by Trump and his family members.

“According to the Committee’s June campaign filing,” the complaint reads, “nearly 20 percent of the funds that the Committee spent were expenditures for the use of properties owned by Mr. Trump or a member of his family. While Mr. Trump and his family are not precluded from receiving rental fees from the Committee for its use of their properties, the magnitude of the proportion of campaign funds spent to compensate Mr. Trump and his family calls for stricter scrutiny by the Commission of this practice.”

A spokeswoman for the Trump campaign did not immediately respond to a request for comment.