The 1908 Missouri gubernatorial election was held on November 3, 1908, and resulted in a victory for the Republican nominee, Missouri Attorney General Herbert S. Hadley, over the Democratic candidate, former Congressman William S. Cowherd, and several other candidates representing minor parties.
This election broke a string of eleven consecutive Democratic governors, as it was the first election since 1870 which did not result in a victory by the Democratic nominee (no Democrat had run in 1870).
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Text from the Wikipedia article “1908 Missouri gubernatorial election”, available under CC BY-SA 4.0.