"Democrats, strong in the cotton region, generally agreed on a low-tariff policy but on little else. Hard-money ‘‘Bourbon’’ Democrats in the Grover Cleveland mold clashed with inflationists whose perennial champion was William Jennings Bryan, ‘‘Boy Orator of the Platte,’’ the ‘‘Great Commoner’’ whose affected rusticity symbolized the economic and cultural gulf that separated Main Street from Wall Street. Self-made men like James Michael Curley of Boston or Al Smith and Robert Wagner of New York, champions of labor who had scrambled up out of immigrant ghettoes like Roxbury or Hell’s Kitchen, sat uneasily in party councils with cotton-South barons like Mississippi’s Senator Pat Harrison or rural Texans like John Nance Garner, men who saw in cheap, nonunion labor their region’s major economic resource. Cerebral reformers like Harvard law professor Felix Frankfurter barely coexisted in the same party with antic populist demagogues like Louisiana’s Huey Long. Cultural differences, too, cleaved the party along the lines that separated Catholics and Jews from old-stock Protestants, divided anti-Prohibition ‘‘wets’’ from fundamentalist ‘‘drys,’’ and distanced urban immigrants from rural Klansmen. These conflicting forces had locked in such irreconcilable conflict at the Democrats’ presidential nominating convention of 1924 in New York that only after 103 ballots did the weary and sweltering delegates settle on a compromise ticket. It had corporation lawyer John W. Davis at its head and Nebraska governor Charles W. Bryan, brother of the Great Commoner, in the vice-presidential slot. Davis’s crushing defeat by Calvin Coolidge seemed to confirm the suspicions of many pundits that the roiling, fractionated mob known as the Democratic Party could never be fashioned into a coherent instrument of governance. ‘‘I don’t belong to an organized political party,’’ quipped America’s favorite humorist, Will Rogers. ‘‘I’m a Democrat.’’"