Final answer:
Teddy Roosevelt became president in 1901 after President McKinley's assassination. His foreign policy focused on American power and protecting national interests.
Step-by-step explanation:
Teddy Roosevelt became president in 1901 following the assassination of President William McKinley. He previously served as Vice President and Governor of New York. Roosevelt's foreign policy, known as the Big Stick Diplomacy, emphasized American power and protection of its interests. He evidenced this through the construction of the Panama Canal and his involvement in the Russo-Japanese War peace treaty negotiations, for which he received the Nobel Peace Prize.
Learn more about Teddy Roosevelt's presidency and foreign policy