Who Is ‘Anonymous’? An Extraordinary Writer

Washington politicians left and right were fascinated and frustrated last week by the publication of an unsigned op-ed column in The New York Times that told of collusion among White House staff to prevent President Trump from running off the rails.

Trump himself, of course, was frustrated most. Who was the Judas among his aides?

Anonymity made the inside story all the more intriguing. Who had written it? Amateurs and experts tried to figure that out. Some guessed about people: Who might be best...