The voice is instantly familiar; the tone, confident, even cocky; the cadence, distinctly Trumpian. The man on the phone vigorously defending Donald Trump says he’s a media spokesman named John Miller, but then he says, “I’m sort of new here,” and “I’m somebody that he knows and I think somebody that he trusts and likes” and even “I’m going to do this a little, part-time, and then, yeah, go on with my life.” A recording obtained by The Washington Post captures what New York reporters and editors who covered Trump’s early career experienced in the 1970s, ’80s and ’90s: calls...