1952: Dwight Eisenhower (primary: Pat Brown)
1956: Dwight Eisenhower (primary: Adlai Stevenson)
1960: John Kennedy (primary: John Kennedy)
1964: Lyndon Johnson (primary: Lyndon Johnson)
1968: Hubert Humphrey (primary: Robert Kennedy)
1972: George McGovern (primary: Edmund Muskie)
1976: Jimmy Carter (primary: Jerry Brown)
1980: John Anderson (primary: Ted Kennedy)
1984: Walter Mondale (primary: Gary Hart)
1988: Michael Dukakis (primary: Al Gore)
1992: Bill Clinton (primary: Bill Clinton)
1996: Bill Clinton (primary: Bill Clinton)
2000: Al Gore (primary: Al Gore)
2004: John Kerry (primary: Howard Dean)
2008: Barack Obama (primary: Hillary Clinton)
2012: Barack Obama (primary: Barack Obama)
2016: Hillary Clinton, (primary: Hillary Clinton)
I thought you'd be a Ford '76 sort.
Eh. It would be a hard choice, but the Nixon pardon would seriously bother me.