Separately, William Burck, attorney for Don McGahn, also said that Trump declined to assert privilege over McGahn's testimony and answered the Special Counsel's questions "fulsomely and honestly."

White House counsel Donald McGahn II, has been quietly cooperating "extensively" with special counsel Robert Mueller in his probe of possible collusion between the Trump campaign and Russia, according to an explosive New York Times report published Saturday afternoon.

Sources told the Times that McGahn has had at least three voluntary interviews with Mueller's team totaling 30 hours, in which he discussed accounts of multiple episodes at the center of Mueller's probe into whether President Trump obstructed justice, as well as the president's furor toward the Russia investigation and the ways in which he urged McGahn to respond to it.