He was not satisfied with William Taft's job as president.
Theodore Roosevelt failed to win the Republican nomination in 1912 and he wanted to be President, so he formed his own party and ran against the Republicans and Democrats.
The Progressive Party was a party created by Theodore Roosevelt in 1912. When he didn't receive the support of the Republican party for the presidential election, and William Taft was supported instead, Roosevelt formed his own party, the Progressive Party. It was mostly made up of Republicans who supported Roosevelt over Taft.
You seem to have answered your own question.
Theodore Roosevelt. When he failed to wrest the Republican presidential nomination away from Taft, Roosevelt and his supporters quit the Republican party and started their own party, so Roosevelt could run for president anyway.
Woodrow Wilson won the Presidential election in 1912 due to Theodore Roosevelt's decision to start his own party. Roosevelt didn't get the Republican nomination so he broke off and created the Progressive Party.
Theodore Roosevelt started his own political party, the Progressive Party, in 1912 after becoming disillusioned with the Republican Party's shift away from progressive reforms. He believed that the party had abandoned its commitment to addressing issues like corporate power and social justice. His decision to run as a third-party candidate was also fueled by his desire to promote a platform focused on progressive ideals, including labor rights and environmental conservation, which he felt were being neglected. Ultimately, Roosevelt aimed to reinvigorate American democracy and challenge the status quo.
Theodore Roosevelt became nationally prominent for his exploits in the Spanish American War and was elected Vice President in the 1900 election. When William McKinley was shot and later died in 1901, Theodore Roosevelt was sworn in as President. TR was elected of his own accord in 1904 but chose not to run in 1908. TR ran as a third-party candidate (the party was known as the Progressive Party and later the Bull Moose Party) in 1912 but lost.
progressive sided with theodore roosevelt when he disagreed with william howard taft over the trust ''busting'' issue
Theodore Roosevelt served as US President from 1901-1909 as a Republican.In 1912 he bolted the party and ran as a "Progressive" or "Bull Moose" candidate,
The Republican party has never split. In 1912, Theodore Roosevelt, broke from the Republicans ,formed his own party and ran against the Republican president.
Progressives sided with Theodore Roosevelt when he disagreed with William Howard Taft over the trust "busting" issue
Theodore Roosevelt was elected as a Republican President in 2004. In 2012, he formed his own Progressive Party, better known as the Bull-Moose Party and ran again.