Maine's Graham Platner is hardly the most extreme Democrat candidate running for office. Graham Platner, the oyster farmer running for the U.S. Senate in Maine, was exposed last month for making a number of damning comments on social media — including posts where he apparently identified as a communist, branded rural white Americans as racists, suggested that service members worried about being raped should buy "Kevlar underwear," and smeared all police officers as "bastards." Although he has since covered it up, Platner was also outed for having a tattoo of a skull image similar to that popularized by Adolf Hitler's...