Graham Platner will kick off starts his first general election at one of the lowest points of his upstart Senate campaign. There has been nonstop coverage, both in Maine and nationally, about racy text messages he sent to women who aren’t his wife, as well as his alleged callous treatment of ex-girlfriends. That drumbeat helped lead to Tuesday’s election results, in which about 20 percent of Maine Democrats essentially gave Platner a no-confidence vote by backing Governor Janet Mills , who had