How did government actions reflect conservative business interests in the 1920s

Isolation and tariffs were the conservative approach to the 1920s. 

Harding, Coolidge, and Hoover were all conservative Republicans who believed America should come first economically and politically. They focused on domestic growth instead of foreign affairs. They were supportive of tariffs on imported goods making American goods more affordable to the consumers. These leaders also rolled back favorable union policies showing a preference for laissez-faire (hands off) economics.