The presidents of the 1920s are famous for an attitude that can be summed up by two famous quotes.
Warren G. Harding wanted a "return to normalcy." Calvin Coolidge said that "the business of America is business." These attitudes typified the Republican governments of the 1920s and were very different from the attitudes of the progressive presidents.
The progressive presidents wanted the government to regulate business and to promote social change. To do that, they "busted trusts" and pushed for legislation to help workers and consumers. By contrast, the presidents of the 1920s did not want to use government to change society and did not want to regulate businesses.