I'd love to live in a timeline where Johnson, Reagan, and Miller have been in the White House (And Eisenhower before the POD too). But I'm not sure how things would be after Biden and Romney.
Anyways:
1960: Adlai Stevenson / John Kennedy
1964: Thomas Dewey / George Romney
1968: John Kennedy/ Carl Sanders
1972: John Kennedy / Carl Sanders
1976: Carl Sanders / Frank Church
1980: Barry Goldwater/George Bush
1984: Ron Dellums / Jimmy Carter
1988: Ron Dellums / Jimmy Carter
1992: Clint Eastwood / Colin Powell (American Party)
1996: Clint Eastwood / Colin Powell (American Party)
2000: Bill Clinton/John Kerry
2004: Bill Clinton/John Kerry
2008:
2012:
2016:
2020:
So Clinton and Kerry are Republicans ITTL? I guess that someone has decided to let the butterflies out to play...