In the Iowa caucuses, Gephardt finished first, Simon finished second, and Dukakis finished third.
In the New Hampshire primary, Dukakis finished first, Gephardt finished second, and Simon finished third.
Dukakis and Gore campaigned hard against Gephardt with negative ads, and eventually the United Auto Workers retracted their endorsement of Gephardt, who was heavily dependent on labor union backing.
In the Super Tuesday races, Dukakis won six primaries, Gore five, Jesse Jackson five and Gephardt one, with Gore and Jackson splitting the southern states. The next week, Simon won Illinois. 1988 remains the race with the most candidates winning primaries since the McGovern reforms of 1971.
Dukakis eventually emerged as the winner,
with Gore's effort to paint Dukakis as too liberal for the general election being unsuccessful and causing him to withdraw. (Highlighted to show that even when he was a centrist, Gore was right. He would have been a far better candidate than Dukakis, but Jackson prevented Gore from sweeping the south, and visa-versa. I had forgotten that Gore and Jackson were the two men playing for those states.)
Jackson focused more on getting enough delegates to make sure African-American interests were represented in the platform than on winning.<2> With most candidates having withdrawn and asking their delegates to vote for Dukakis, the tally for president was as follows:
Michael Dukakis 2687
Jesse Jackson 1218
Joseph Biden 2
Richard Gephardt 2
Gary Hart 1
Lloyd Bentsen 1
http://en.wikipedia.org/wiki/Democratic_Party_%28United_States%29_presidential_primaries%2C_1988#Primaries(This map seems wrong to me... maybe it excludes caucuses or something. I thought Jackson won more states than shown here, but maybe I'm remembering surprising 2nd place finishes as wins.)