President Rockefeller and Governor Reagan compete in a disastrous nominating contest on the GOP. Who ever comes out on top, goes down in flames against who ever is nominated by the Democrats. I'm thinking Reagan is the nominee and loses badly to Carter. Carter has a much larger margin in the Electoral and Popular Vote, is it enough to alter his Presidency? I'm not sure. If Rockefeller wins the nomination, he loses to Carter, only for Reagan to come back in 1980.
But an assassination of Ford would be very traumatizing for an already traumatized America. Ditto for Reagan in 1981. I'm not sure if America's psyche could have recovered from either of those. Could you imagine, though, if Rockefeller wins the nomination and Presidency in 1976 and dies the same way he did in real life? Now that's three dead Presidents in twenty years (Kennedy, Ford, Rockefeller) and two driven from the White House due to decisions they made.