South Bend Mayor Pete Buttigieg is officially a candidate for the 2020 Democratic nomination. You wouldn’t think that a mayor of a small city would be in contention, but he’s at the top. His star has been rising since rumblings of his campaign moves were reported. He raised more money than better-known progressives, like Sen. Elizabeth Warren (D-MA). He’s in the top five in terms of those filling their war chests. He’s apparently been well received in Iowa. So, with the 2020 Democratic clown car getting bigger, how do you thin the heard? Well, you attack and it seems the opposition...