People can change. I have seen it, and I have lived it. Just when change happens can generally be grasped only in retrospect. In the case of Senate hopeful Graham Platner of Maine, many Democrats are understandably eager to see evidence that he is no longer the man implicated by the drumbeat of damning revelations. Platner’s campaign promise has long been that he’s just an ordinary guy who has learned from his many mistakes—that he is no longer the man who picked fights online, belittled women, and otherwise drank and swore and argued too much. But on the eve of Maine’s primary elections next week, and in light of yet more reports of “reckless” and “unsettling” behavior, in the words of one ex-girlfriend, many voters may be wondering if this aspiring representative of the people has in fact changed enough. Platner, a gruff 41-year-old Marine Corps veteran, is trying to unseat Republican Senator Susan Collins with a platform of economic populism, universal health care, labor protections, and anti-interventionism. Although he was raised on the shores …