What factor had the most influence on the outcome of the presidential election of 1912

Answer:United States presidential election of 1912, American presidential election held on November 5, 1912, in which Democrat Woodrow Wilson defeated Bull Moose (Progressive) candidate and former Republican president Theodore Roosevelt and Republican incumbent president William Howard Taft. The Rise Of The Republican "Insurgents"

Theodore Roosevelt first came to the presidency in 1901, following the assassination of William McKinley, but won election in his own right in 1904 and proved a very popular chief executive. Shortly after the election of 1904, he announced that he would not be a candidate four years later-though he was so much the idol of the masses that he could easily have gained the Republican nomination in 1908. Adhering stubbornly to his pledge, he arranged the nomination of his secretary of war, William Howard Taft, who was easily elected president in 1908.