SANTA MONICA, California — Dilbert cartoonist Scott Adams looks thoughtful in in the lobby of a beachfront hotel on a sunny Thursday afternoon as he tells me that the phrase “jobs not mobs,” which he suggested on Twitter six days before, would be catchy — though he adds that Republicans had not yet used it. Literally minutes later, President Donald Trump tells a rally in Montana: “Democrats produce mobs. Republicans produce jobs.” The president tweets soon afterwards: “#JobsNotMobs.”