Top Trump Campaign Aide Clovis Spoke to Mueller Team: Source

Sam Clovis, the former top Trump campaign official who supervised a man now cooperating with the FBI's Russia investigation, was questioned last week by Special Counsel Robert Mueller's team and testified before the investigating grand jury, a person with first-hand knowledge of the matter told NBC News.

Clovis, who is President Donald Trump's pick to be the Department of Agriculture's chief scientist, could not be reached for comment. His lawyer, Victoria Toensing, would neither confirm nor deny his interactions with the Mueller team.

"I'm not going to get into that," she said in an interview.

George Papadopoulos pleaded guilty to lying to the FBI in July and began cooperating with agents, records show — disclosing his interactions with a professor and other Russians whom the FBI suggested in court documents may have been working for Russian intelligence agencies.