An Inconvenient TRUTH
The 1924 Democratic National Convention, held at the Madison Square Garden in New York City from June 24 to July 9, 1924 was nicknamed "the klanbake." Google it for yourself.
Ku Klux Klan presence
The Ku Klux Klan had surged in popularity after World War I, due to its leadership's connections to passage of the successful Prohibition Amendment to the U.S. Constitution. This made the Klan a political power throughout many regions of the United States, and it reached the apex of its power in the mid-1920s, when it exerted deep cultural and political influence on both Republicans and Democrats. Its supporters had successfully quashed an anti-Klan resolution before it ever went to a floor vote at the 1924 Republican National Convention earlier in June, and proponents expected to exert the same influence at the Democratic convention. Instead, tension between pro- and anti-Klan delegates produced an intense and sometimes violent showdown between convention attendees from the states of Colorado and Missouri. Klan delegates opposed the nomination of New York Governor Al Smith because Smith was a Roman Catholic and an opponent of Prohibition, and most supported William Gibbs McAdoo. Non-Klan delegates, led by Sen. Oscar Underwood of Alabama, attempted to add condemnation of the organization for its violence to the Democratic Party's platform. The measure was narrowly defeated, and the anti-KKK plank was not included in the platform.
Over half of the attendees at the 1924 Democratic National Convention were card-carrying members of the KKK.