Final answer:
Billy Sunday was both a professional baseball player and an influential evangelist in the 1920s. The Second Ku Klux Klan promoted '100% Americanism' with nativist and supremacist activities. President George W. Bush's foreign policy was not characterized by liberal internationalism but by conservative interventionism.
Step-by-step explanation:
The individual who was both a professional baseball player and an influential evangelist during the 1920s was Billy Sunday. He played for the Chicago White Stockings in the National League and became one of the most influential American evangelists during the early 20th century. His sermons condemned the evils of alcohol and promoted Prohibition; he used his notoriety to influence public opinion.
The platform of the Second Ku Klux Klan focused on '100% Americanism', which supported nativism, Protestantism, and white supremacy. Activities conducted to promote this platform included marches, parades, and violent acts, such as lynchings and intimidation, against those viewed as un-American or racially inferior.
In regard to foreign policy, it is false to claim that President George W. Bush was a proponent of liberal internationalism. Bush's foreign policy leaned more towards a blend of unilateralism and elements of conservative interventionism, particularly evident in the actions taken post-9/11 and the following 'War on Terror'.