Opinion: Candidates Who Are Actually Funny Usually Win Debates

There’s been a lot of chatter about how two very old men will be sufficiently jacked-up before Thursday’s presidential debate. But as an expert on debates—having successfully advised candidates including Scott Walker (in his recall election), Carly Fiorina (in her Senate race), and multiple British politicians on debate tricks and tactics—I’d like to suggest a different form of debate prep.

Both Donald Trump and Joe Biden should...