If you think you've been exposed to a lot of Donald Trump lately, try being Joe Randazzo.
Randazzo, the former editor of the Onion, spent months last year immersed in the collected clips and writings of the GOP front-runner, turning his research into a 1980s-set parody script for the website Funny or Die.
"I was ready," he recalled dryly, "to jump off a bridge."
That work paid dividends for the rest of us, however. Americans went to bed Tuesday night after watching cable-news coverage of Trump's...