At a time when former New York City Mayor Rudy Giuliani has moved to the forefront as one of Donald Trump’s highest profile advocates, law firms associated him have also been profiting to the tune of over $500,000 worth of “legal consultations” with a super PAC fully behind the candidacy of the GOP presidential nominee.

According to a report at the Daily Beast, a PAC controlled by hedge-fund billionaire Robert Mercer threw a substantial amount of money towards the firm of Bracewell & Giuliani until the the former mayor left, only to move their business to Giuliani’s new firm, Greenberg & Traurig in May of this year.

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The PAC, originally called Keep the Promise 1 when it backed Texas Sen. Ted Cruz, paid Giuliani’s original firm $336,495 between September of 2015 and February of 2016.

In May, the PAC resumed business with Giuliani at his new firm, paying them $99,470 for legal and compliance services, before changing its name to Make America Number 1 and aligning itself with Trump the following month.

According to the report, Greenberg & Traurig was paid $9,698 for “legal consulting services” the day after the GOP National Convention, at which Giuliani gave a barn-burner speech in support of Trump. The timing of the payment raises legal questions over whether the PAC was paying Giuliani’s expenses to attend the convention which could be a violation of federal guidelines creating a firewall between PACs and candidate’s campaign.

Since then, Greenberg & Traurig has received an additional three payments tallying $118,340 for “legal consulting services,” at a time when Giuliani has become one of Trump’s highest profile surrogates while also being described as a senior adviser to the campaign.

In recent days, Giuliani has been accused of funneling leaks about FBI investigations into Democratic presidential nominee Hillary Clinton to the Trump campaign as well as the media.

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You can read the full report here at The Daily Beast.