1960 - Clinton is Nixon and Trump is JFK.
Many people refused to vote for JFK - not because he was an egotistical, bigoted buffoon, but because he was a Roman Catholic. JFK was charismatic, while Nixon was the robotic voice of the establishment. Dirty tricks were employed to decide a key state (EDIT: Hasn't happened yet, but it wouldn't surprise me).
The popular vote margin was 0.17%, which makes Gore's PV margin over Bush look like a landslide.
You have a point about 1960..
So is 1960 or 1948 closer?