Herbert S. Hadley examiners' board, a fish and game commission, a game protection board, and a Missouri waterways commission. Many of Hadley's recommendations for change in other government sectors, such as revenue and public service, were not supported by the Missouri General Assembly. In 1912, Hadley served as floor leader for Theodore Roosevelt's wing of the Republican Party at the 1912 Republican National Convention. After the death of Vice President James S. Sherman in October 1912, President William Howard Taft strongly considered naming Hadley as Sherman's replacement on the 1912 Republican ticket, but Taft ultimately did not select a replacement before the election
Presidency of William Howard Taft but two other presidents. His administration was filled with conflict between the conservative wing of the Republican Party, with which Taft often sympathized, and the progressive wing, toward which Roosevelt moved more and more during Taft's presidency. Controversies over conservation and over antitrust cases filed by the Taft administration served to further separate the two men. Roosevelt challenged Taft at the 1912 Republican National Convention, but Taft was able to use his control of the party machinery to narrowly win his party's nomination. After the convention, Roosevelt left the party, formed the Progressive Party, and ran for president in the