To the dismay of party members in the South, the convention adopted a civil rights platform supporting Truman's actions as President. When MinneapolismayorHubert Humphrey addressed the convention, he urged the Democratic Party to "get out of the shadow of states' rights and walk forthrightly into the bright sunshine of human rights" All 23 members of the Mississippi delegation, led by Governor Fielding L. Wright and former Governor Hugh L. White, walked out of the assembly. The thirteen members of the Alabama delegation followed, led out by Leven H. Ellis. This was a launching point for Humphrey; he was elected to the United States Senate later that year and to the Vice Presidency in 1964. The rebel delegates later nominated Strom Thurmond as the presidential nominee of the States' Rights Party (Dixiecrats).
In the absence of three dozen Southern delegates who walked out of the convention with Thurmond, 947 Democrats voted to nominate Truman as their candidate (against 263 for Senator Richard Russell, Jr. of Georgia).