Primary map (top) only shows primaries, not caucuses or other delegate-selection contests. Convention map based on which candidate got the plurality of votes from each state on the first ballot, before switching. Information from Congressional Quarterly publications.
The 1968 Democratic nomination struggle was chaotic in a chaotic year, starting with anti-war candidate McCarthy’s near-upset of incumbent Johnson in New Hampshire (Johnson still won the state but withdrew from the race). Kennedy and McCarthy, neither a favorite of the party leaders, both took several primaries. RFK’s big win in California was followed by his murder. At the convention in Chicago, the party establishment picked Humphrey, who had not been a factor in the primaries, and they brushed aside the anti-war faction while outside the convention protests and police violence contributed further to the image of a party in disarray. The racist-Christian wing of the Democratic party in the South abandoned the national party to support Wallace’s third-party run, although Nixon managed to stress the social-conservative issues enough to also draw some of these voters and squeak by Humphrey and win the presidency.
Schedule of 1968 primaries from Congressional Quarterly’s Presidential Elections, 1789-1996
March 12: New Hampshire
April 2: Wisconsin
April 23: Pennsylvania
April 30: Massachusetts
May 7: DC, Indiana, Ohio
May 14: Nebraska, West Virginia
May 28: Florida, Oregon
June 4: California, New Jersey, South Dakota
June 11: Illinois
Classic races for the nomination, pre-1972, depicted in maps
Primaries and caucuses 1972 and afterwards