Humphrey would have moved more quickly to deescalation and made Nixon attempts to sabotage Paris talks public, costing Nixon the election. The Chennault connection and its impact on the war is way underrated by historians, it's probably worse than Watergate.
✓ President Hubert Humphrey (D-MN)/Vice President Edmund Muskie (D-ME): 287 EVs.; 45.1%Former Vice President Richard Nixon (R-NY)/Governor Spiro Agnew (R-MD): 206 EVs.; 41.0%Former Governor George Wallace (A-AL)/General Curtis LeMay (A-CA): 45 EVs.; 11.2%CA could go either way, it would be very close like NJ, MO and OH.