Trump had discussed pardoning Manafort, but that hadn’t happened. And now it’s too late, said Trump defender and Harvard law professor Alan Dershowitz.

“There’s no doubt” Mueller is interested in information about Trump, Dershowitz said on MSNBC on Friday (beginning at 3:30 in the video below). And once Manafort agrees to cooperate, “he has to cooperate about everything,” Dershowitz added. “There’s no such thing as partial cooperation.”

A presidential pardon now is “off the table; it’s too little, too late,” Dershowitz explained. “It would backfire at this point. If he’s given a pardon, then he [Manafort] can’t take the Fifth Amendment” to protect himself from self-incrimination. “He would have to testify anyway. He could be called in front of a grand jury.”

From the point of view of Mueller, this is a “big win,” said Dershowitz. “It potentially opens up lots of doors that probably haven’t been opened before.”