According to the White House Historical Association, Happy Days Are Here Again was the campaign song of the convention.

[1] The three major candidates: The three major contenders for the presidential nomination were Roosevelt, Garner and former Governor of New York and 1928 presidential candidate, Al Smith, who roughly represented three competing factions of the Democratic Party: The new Democratic coalition would begin at this convention: Roosevelt brought into the Democratic fold western progressives, ethnic minorities, rural farmers, and intellectuals.

[3] After three ballots, Roosevelt was 86.75 votes short of the 769.5 votes required to win the nomination, and his campaign feared that his support had peaked: as none of New York, New Jersey, Massachusetts or Connecticut supported Roosevelt, he needed McAdoo, who led the California delegation, and Garner, who led the Texas delegation.

After McAdoo (who had been denied the nomination by the two-thirds rule at the 1924 convention) announced that California would back Roosevelt, the convention realized Roosevelt had reached the required 769.5 delegates to win the nomination, which was greeted by wild celebrations.

[4] Pietrusza, David 1932: The Rise of Hitler & FDR: Two Tales of Politics, Betrayal, and Unlikely Destiny Guilford CT: Lyons Press, 2015.