President Donald Trump believes special counsel Robert Mueller will treat him fairly in his ongoing investigation, but he is curious why charges have not yet been filed against democratic lobbyist Tony Podesta.

"Whatever happened to Podesta?," the president asked during a wide-ranging New York Times interview published Thursday. "[T]hey closed their firm, they left in disgrace, the whole thing, and now you never heard of anything."

Trump referenced the apparent scrutiny the Podesta Group is under by Mueller's team for lobbying work it did in the U.S. on behalf of former Ukranian leader Viktor Yanukovych. The lobbying reportedly resembles the same activity former Trump campaign chairman Paul Manafort was indicted for by the special counsel.

The Podesta Group, once headed by brother of former Clinton campaign chairman John Podesta, is likely to close by the end of this year. His brother, Tony Podesta, stepped down from his position at the firm in late October.

Trump demurred on the significance of charges against Manafort saying, "Paul only worked for me for a few months."