Senator Hubert Humphrey (D-MN) / Senator Edmund Muskie (D-ME)
Fmr. Vice President Richard Nixon (R-CA) / Governor Spiro Agnew (R-MD) ✓
Fmr. Governor George Wallace (AI-AL) / General Curtis LeMay (AI-CA)
Vice President Eugene McCarthy (I-MN) / Senator George McGovern (I-SD)
McCarthy opposes Vietnam and considers resigning, but stays on to run what he thinks will be a more viable campaign against Johnson in 1968. Humphrey, the perennial lunch pail establishmentarian, still wins the nomination and McCarthy ends up running third party in one of the weirdest moments in US political history.