Send in the clowns. The Washington Post published an opinion piece defending the good name of clowns everywhere — fervently insisting President Trump doesn’t deserve the harlequin moniker his rivals frequently foist upon him. “Donald Trump is not a clown. I should know,” reads the headline of the missive penned by Tim Cunningham — a self-described professional clown of 24 years and board president of the not-at-all-terrifying-sounding nonprofit Clowns Without Borders. The article cites a few examples lefty commentators disparagingly painting Trump or his administration as clowns over the years, including MSNBC’s Lawrence O’Donnell and political strategist James Carville. But...