Graham Platner, the presumptive Democratic nominee for Senate in Maine, appeared Thursday night in his first interview since a New York Times report about his treatment of several women he had dated, denying one woman’s account that he had physically harmed her and saying he would not drop out of the race.In a nearly 25-minute appearance on MS Now’s “All In With Chris Hayes,” Platner said he would “absolutely” take responsibility for elements of his personal history. He described a history of self-medicating, and a pattern of “not exactly acting with the best behavior” after his service in the military.But...