If this election could be compared to any previous election, it would be the 1980 election
The Hitler comparisons are essentially just typical internet rhetoric that both sides engage in every election cycle. No one ever accused Godwin's law of being false.
1960 and 1976 actually, thanks for helping me think a bit more
1960 and now
Young Kennedy, Young Obama
Old looking Nixon, Old McCain
Young inspired by Kennedy, Young inspired by Obama
1976 and now
People tired of Repubs (Nixon, Ford), People tired of Repubs (Bush)
Hitler and Obama
Both came to power with their oratory skills, when their countries were under economic stress, and both were inexperienced