(Sen. John Sparkman - D-Alabama - I know what you're thinking!)
Before Blue Dogs arrived on the political scene, we had Dixiecrats. That bunch of Southern Senators who always seemed to break with the rest of their party and go off on tangents, mostly about Civil Rights legislation at the time.
Here he is, explaining his position, during the Sunday interview program "Chicago University Roundtable" from June 13, 1948 - the subject was "The Southern Democrats and the Convention".
Sen.Sparkman: “In our primary that was held May 4th, with runoff on June 1st, we selected delegates to the Democratic Convention to be held in Philadelphia. All of those delegate, every one without exception, is pledged against Truman. Furthermore, we named our Democratic electors who are to cast Alabama’s vote in the Electoral College in November . . .in December – elected in November. Every one of those electors, there are eleven of them, made a pledge to the people of Alabama prior to that election that, if chosen as an elector, each one of them pledged that he would not, under any condition, vote for President Truman.”
Talk about inspiring Party Unity. The irony to all this, is Sparkman wound up being Adlai Stevenson's Vice-Presidential running mate in 1952.
Somehow, it now makes sense why Stevenson didn't win in 1952.