The 1912 election was very unusual though – in rather different ways from the current one. It was a three way contest between Wilson (Democratic), Roosevelt (Progressive) and Taft (Republican) – all three of whom won electoral college votes – plus Debs (Socialist), who while he didn't win any electoral college votes, got 6% of the popular vote. I'd be very careful drawing any conclusions from the 1912 election, unless we were dealing with a similar sort of 3/4-way contest – which we aren't, RFK Jr might get 5-6% of the popular vote like Debs did, but no way he's winning anything in the electoral college.