In the wake of the Kathy Griffin severed-head fiasco, and the Central Park play depicting the assassination of President Trump, you’d think that pundits might have the good sense to lay off metaphors invoking the violent death of the president. But today comes law prof Jonathan Turley with yet another sanguinary simile. Appearing on Morning Joe to discuss President Trump’s executive order on travel, Turley suggested that President Trump’s tweets on the subject are undermining his case. Then Turley went there: “it’s like a presidential version of death by cop. Every time you seem to make advances, the president seems...