Vice-President Hubert Humphrey (R-MN)/Senator Robert F. Kennedy (D-NY): 257 Electoral VotesFormer Vice-President Richard Nixon (R-CA)/Governor Spiro Agnew (R-MD): 254 Electoral VotesGovernor George Wallace (AI-AL)/General Curtis LeMay (AI-CA): 27 Electoral VotesThe election would go to the House, where Nixon would likely work out a deal with Wallace in which all of the electors pledged to him would vote for Nixon and in turn, a deal would be made in which the Senate would vote to make Wallace Vice-President.
I think that Robert Kennedy would make a comeback in 1976, in Jimmy Carter's place, ultimately defeating President Wallace, who would become President after Nixon resigned due to Watergate. By 1980 however, due to the mediocre economy and troubles on the world stage, Ronald Reagan would win against Kennedy, just like he did n RL against Jimmy Carter. From that point forward, history would remain the same.