President Donald Trump has been receiving a great deal of criticism for appointing Richard Grenell (U.S. ambassador to Germany) as his acting intel chief despite the fact that he has zero experience in national intelligence. And Isaac Arnsdorf, in an article for the Defense One website, asserts that there is another major reason why Grenell is problematic: he once did consulting work for the controversial Moldavian oligarch Vladimir Plahotniuc, who has been accused of corruption and barred from entering the United States.

In 2016, Arnsdorf writes, Grenell “wrote several articles defending the oligarch” and “did not disclose that he was being paid, according to records and interviews.” Moreover, Arnsdorf writes, Grenell “did not register under the Foreign Agents Registration Act, which generally requires people to disclose work in the U.S. on behalf of foreign politicians.”

Arnsdorf, however, adds that it is “not clear” whether or not those pro-Plahotniuc articles “were directly part of Grenell’s paid consulting work for Plahotniuc.”

Craig Engle, an attorney for the firm Arent Fox, said that Grenell didn’t have to register under the Foreign Agents Registration Act “because he was not working at the direction of a foreign power.”

According to Engle, “Ric was not paid to write these stories. In fact, he has written hundreds of stories on his own time to express his own views. But to be clear: he was not working for any individual. He was working for himself and was advocating the ideal of a pro-western political party that was emerging.”

Grenell continues to serve as U.S. ambassador to Germany, and Trump has expressed no interest in nominating Grenell as a permanent intel chief. One person Trump has expressed interest in for the position is Georgia Sen. Doug Collins, a Republican.

Plahotniuc, Arnsdorf notes, fled Moldova in 2019. His current whereabouts are unknown.