The Bull Moose Party was a political party in the United States formed in 1912 by former President Theodore Roosevelt. It emerged from a split in the Republican Party when Roosevelt ran for president after losing the party's nomination to William Howard Taft. The party advocated for progressive reforms, including women's suffrage, labor rights, and social justice. The name "Bull Moose" symbolized strength and vigor, reflecting Roosevelt's energetic campaign style. Although the party was short-lived and dissolved after the 1912 election, it significantly influenced American politics and contributed to the rise of the Progressive Movement.