Sen. John Fetterman issued a scathing takedown of Graham Platner as the leading Democratic candidate in Maine’s Senate race has become embroiled in a scandal over reports that he sent sexual text messages to women who were not his wife. In an interview with CNN Tuesday, the Pennsylvania Democrat also laid into Platner over past social media posts that have haunted Platner’s campaign for months. Fetterman likened Platner to a “Nazi sympathizer” over a now-infamous tattoo resembling a Nazi symbol. Platner has apologized for the past posts and has pleaded ignorance over the meaning of the tattoo, which he has...