The can of worms opened with a teasing tweet from @tribelaw, the Twitter account of Harvard Law School professor Laurence Tribe.

Tribe, a frequent social media critic of Republican presidential candidate Donald Trump, disclosed that Trump had called him for legal advice 20 years ago. Saying he kept his notes from the call and implying he might release them, the constitutional law scholar mused whether his discussion with Trump in 1996 would fall under the attorney-client privilege. (Tribe’s tweet came in response to Democratic consultant Bob Shrum, who called Trump a blowhard — a charge with which Tribe appears to agree.)