Railing against the "criminalization of political differences," civil liberties legal expert Alan Dershowitz hopes fired FBI Deputy Director Andrew McCabe does not face charges for his potential lies to investigators.

"I don't like the criminalization of political differences," Dershowitz told "The Cats Roundtable" on 970 AM-N.Y. "What McCabe did is very questionable. But did he cross the line into criminality? I just haven't seen the case made for that."

President Donald Trump critics have railed on Dershowitz's public defenses of the president, but he told host John Catsimatidis his position is nonpartisan.

"I would like to see us pull back on using the criminal law against political figures who one disagrees with," he added. "I didn't like it when they went after Hillary Clinton. I didn't like it when they went after President Trump. I didn't like it when they went after the people in the FBI.

"I think we overuse the criminal law. And we have weaponized it as part of our political system. And that poses serious questions for the rule of law and democracy."

Dershowitz added praise for Attorney General William Barr, who has directed the investigations of the investigators, as the "right choice to bring credibility back to the Justice Department."

Dershowitz is author of "Trumped Up: How Criminalization of Political Differences Endangers Democracy" and most recently "Defending Israel: The Story of My Relationship with My Most Challenging Client."