Representative John Lewis of Georgia poured salt on Donald Trump’s wounded ego, tweeting that Trump was not a “legitimate president.” Trump responded angrily, as one would expect. This isn’t the first time that a president-elect’s legitimacy has been questioned. In 1960 it was generally understood that John F. Kennedy owed his victory to creative vote-counting by Mayor Daley of Chicago. Richard Nixon took the high road and accepted Kennedy’s victory while his surrogates vigorously pursued recounts. Kennedy, who won by the slimmest of popular vote margins, stayed above the fray. In his mind there was no doubt who was president.