Viewing Frank Kellogg and the Origins of the Roosevelt-Taft Break (1912).
The break between former President Theodore Roosevelt and President William Howard Taft is the most famous in American political history. Roosevelt's disillusionment with his successor festered for years, finally erupting in 1912 when he unsuccessfully challenged Taft for the nomination of the Republican Party at its convention in Chicago in June. Undeterred he founded the Bull Moose Party, and ran for president with its endorsement. This split the Republicans and enabled Democrat Woodrow Wilson to coast to victory.