Who was Teddy Roosevelt?

Theodore “Teddy” Roosevelt was the 26th president of the United States, serving from 1901 to 1909. At 42, he was the youngest president yet when he took over following the assassination of William McKinley. Prior to serving as Commander-in-Chief, Roosevelt was a military commander. He made a name for himself during the Spanish-American war when, as a lieutenant colonel, he led his regiment in a charge at the Battle of San Juan. He would go on to serve as Republican governor of New York state from 1898. Among his major achievements as president were playing a major role in the negotiations to begin the construction of the Panama canal, which opened up a route from the Atlantic to the Pacific, and his mediation in the Russo-Japanese war, for which he received the Nobel Peace Prize.
He saw government as an agent of reform and challenged the idea of limited government that had been prevalent during the 1800s. One way in which he did this was by expanding executive powers and strengthening the role of the president. He argued that the president was a steward accountable to the people. One notable feature of his campaign style was his personal rapport with the population. Roosevelt was seen, as noted in the Heritage Foundation article linked below, as the first president who won support from voters due to his personality, rather than as a member of the Republicans or Democrats. Roosevelt ran once again for president as a Progressive in 1912. He was shot at a campaign rally in Milwaukee but made a recovery. He died in 1919, aged 60. He is one of the presidents whose face is featured on Mount Rushmore.
https://millercenter.org/president/roosevelt/impact-and-legacy

https://www.heritage.org/political-process/report/theodore-roosevelt-progressive-crusader