Alan Dershowitz is known as a defender of notorious news makers, including O.J. Simpson and Jeffrey Epstein. But it's another client that caused prominent liberals, friends, and even some family members to reject him: the noted lawyer's defense of Donald Trump during impeachment.

"The Constitution provides only four grounds for impeachment, treason, bribery, or other high crimes and misdemeanors.They didn't charge him with that. They didn't charge him with any kind of criminal type or like behavior. They charged him with abuse of power and obstruction of Congress that are unconstitutional," Dershowitz explained. "So, of course, I would defend him."

And for that, Dershowitz says he's paid a high price. He details the experience in his latest book de– his fiftieth – The Price of Principle: Why Integrity is Worth the Consequences.

Dershowitz writes that today in America, partisan advocacy masquerades as principled argument. He contends hypocrisy and a far left agenda elevate identity over principle. 

Once accepted by his community, the former Harvard Law professor isn't getting invitations to return to venues like New York's Temple Emanuel and the 92nd Street Y. Dershowitz said even the public library has banned his books, and he's no longer welcome at most social gatherings.