Rudy Giuliani’s henchmen appeared in court on campaign finance violations, and they may attempt to claim evidence in the case is protected by executive privilege.

Ukrainian-American businessmen Lev Parnas and Igor Fruman, who were arrested earlier this month on their way out of the country on one-way tickets, pleaded not guilty Wednesday in their first court appearance, according to Courthouse News.

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Prosecutors told the court they had issued subpoenas for 50 bank accounts related to the pair.

But an attorney for Parnas told the judge there may be concerns to sort out related to executive privilege due to their relationship with Giuliani, who serves as President Donald Trump’s personal attorney.