Final answer:
Teddy Roosevelt ran as an independent candidate for president in 1912 as the candidate of the Progressive Party, also known as the Bull Moose Party.
Step-by-step explanation:
Teddy Roosevelt ran as an independent candidate for president in the year 1912. Having served as president from 1901 to 1909, he passed on running in 1908, a promise he made after winning reelection in 1904. Instead, he supported his friend William Howard Taft. However, by 1912, Roosevelt was dissatisfied with Taft's presidency and sought to reclaim leadership, but the Republican Party renominated Taft. As a result, Roosevelt ran as the candidate of the Progressive Party, often referred to as the Bull Moose Party. His decision resulted in a split in the Republican vote, which ultimately contributed to the election of the Democratic candidate, Woodrow Wilson.