Alan Dershowitz, a Harvard law professor and frequent defender of President Donald Trump, has a grim prediction for the president regarding the outcome of special counsel Robert Mueller’s Russia investigation.

“I think the report is going to be devastating to the president,” Dershowitz told ABC’s “This Week” on Sunday. “And I know that the president’s team is already working on a response to the report. ... When I say devastating, I mean it’s going to paint a picture that’s going to be politically very devastating.”

Dershowitz expressed doubt that Mueller’s findings would result in criminal charges against the president, stating that “collusion is not criminal.” He also dismissed host George Stephanopoulos’ suggestion that the special counsel could accuse Trump of conspiring “to cooperate with an attempt to defraud the U.S. government.”

“It’s too much of a stretch,” Dershowitz told Stephanopoulos. “What I think Mueller is going to do if he’s smart ― he’s not going to take the chance on being rebutted ... he’s going to lay out the facts, leave it to Congress to decide whether that rises to the level of an impeachable offense.”