The White House press secretary Ms Sanders confirmed she had been interviewed in a statement, first published on CNN.
Ms Sanders said: ”The President urged me, like he has everyone in the administration, to fully cooperate with the special counsel.
“I was happy to voluntarily sit down with him.”
US intelligence agencies have said Moscow interfered in the election in an effort to tip it to Republican Donald Trump and away from his Democratic challenger, Hillary Clinton.
Special Counsel Robert Mueller is investigating the allegations and whether anyone in President Trump’s campaign may have colluded with Russia.
He is also looking into whether Mr Trump may have tried to obstruct the investigation.
Moscow has denied meddling in the campaign. Mr Trump, who has frequently derided Mr Mueller’s probe as a “witch hunt,” has denied any wrongdoing.
More to follow.
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