NEWYou can now listen to Fox News articles! BAR HARBOR, Maine – Facing arguably the roughest stretch to date of his campaign for the U.S. Senate, Democratic candidate Graham Platner, back on home turf, thanked a large crowd of supporters for having his back and charged the incoming fire he's facing is "politically motivated."Platner, the military veteran and oyster farmer who is aiming to oust longtime Republican Sen. Susan Collins in this year's midterm elections, has been playing defense amid multiple controversies, ranging from inflammatory online comments made on Reddit, a well-publicized and now covered-up tattoo on his chest that...