Another current Giuliani client is the Mujahideen-e-Khalq, or MEK, an Iranian resistance group operating in exile that was listed as a terrorist group by the State Department as recently as 2012. Giuliani said he has regularly received payments from MEK over the past 10 years; he declined to disclose his fees.

Giuliani acknowledges giving a paid speech to the group in May in Washington, and he delivered another speech at an MEK gathering outside Paris on Saturday advocating regime change in Tehran. He said before the conference he planned to spend “three or four days” in Paris helping the group.

For years, Giuliani has been one of the most prominent American officials to advocate on behalf of the Mujahideen-e Khalq (MEK), a Marxist Iranian opposition group that claims to be the legitimate government of Iran and resembles a cult. A Treasury Department investigation in 2012 examined whether speaking fees paid by several MEK front groups to a long list of U.S. politicians, including Giuliani, violated laws on Americans receiving money from designated terrorist organizations.

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For years, Giuliani has been one of the most prominent American officials to advocate on behalf of the Mujahideen-e Khalq (MEK), a Marxist Iranian opposition group that claims to be the legitimate government of Iran and resembles a cult. A Treasury Department investigation in 2012 examined whether speaking fees paid by several MEK front groups to a long list of U.S. politicians, including Giuliani, violated laws on Americans receiving money from designated terrorist organizations.

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It’s illegal for American citizens to do business with a group designated as a foreign terrorist organization.

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Other potential Trump administration appointees took money to advocate for the MEK while it was listed as a foreign terrorist organization, including former ambassador John Bolton and former CIA director James Woolsey, but they were less involved than Giuliani.

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In October 2012, after the MEK finally relented to State Department pressure and moved to Camp Liberty, Secretary of State Hillary Clinton decided to remove it from the foreign terrorist organization list. What happened to the Treasury Department’s investigation after that is unclear.