Fearmongering? A troubling aspect behind John Roberts' presidential immunity decision

Like many of you, I’ve been going over Chief Justice John Roberts’ presidential immunity decision, trying to understand the distinction it sets out between “official” acts of a president, which are immune from prosecution, and “unofficial” acts, which are not immune. And I wanted to share with you a particularly troubling aspect.

Having served in the Justice Department soon after Richard Nixon sought to use the department to go after the people on his “enemies list,” I was struck by Roberts’s...