Why did Teddy Roosevelt form the progressive Bull Moose party and run against Taft in 1912?

The Progressive Party (often referred to as the "Bull Moose Party") was a third party in the United States formed in 1912 by former president Theodore Roosevelt after he lost the presidential nomination of the Republican Party to his former protégé and conservative rival, incumbent president William Howard Taft.

The second , larger puritan colony of massachusetts bay was conceived as a "city upon a hill". but it also struggled with internal turmoil like the salem witch trials and external conflicts like king philip's (metacom's) war.