A former campaign adviser to President Donald Trump has reportedly been called to meet with special counsel Robert Mueller for an interview, in regards to the Russian “collusion” investigation.

Politico reported that the interview was scheduled for Thursday.

Nunberg was an outspoken Trump aide who got fired in August 2015 over racially charged Facebook posts. Trump later sued Nunberg for $10 million for breaching a confidentiality agreement. They settled the case a month later.

Nunberg, who will be accompanied for the Mueller interview by defense attorney Patrick Brackley, got an invitation to meet with the special counsel in mid-January soon after the publication of Michael Wolff’s tell-all “Fire and Fury.”

Fox News reported further on Nunberg being interviewed by Mueller:

It’s unclear what Nunberg might be about to provide the Mueller team as it continues to look into Russian meddling since he left early in the campaign. That said, interest in what Nunberg has to say shows the investigation is continuing despite statements from the president himself that it is coming to an imminent conclusion.

One area that Nunberg could shed light on for the special prosecutor’s office is when Trump began seriously considering running for president. Trump, in a recent tweet concerning Mueller’s indictments of 13 Russian nationals on charges of meddling in the election, said the effort was not connected to his campaign since it began in 2014, “long before” he decided to run for president. Trump officially announced he was running for president in June 2015 during a lavish ceremony at Trump Tower in New York City.