Final answer:
Pro-business politicians like Warren Harding and Calvin Coolidge supported big business interests, while trust-busting politicians from the Progressive Era, such as Theodore Roosevelt and William Howard Taft, opposed monopolistic trusts.
Step-by-step explanation:
Politicians who are seen as allies of big business and the trusts often promote policies that favor the interests of large corporations. During the 1920s, for example, President Warren Harding and his administration were known for having a pro-business orientation. Harding's Vice President, Calvin Coolidge, summarized this stance with the phrase "the business of America was business," indicating a climate of government support for business interests over regulation.
On the other hand, politicians described as opposing the trusts are those who support trust-busting measures intended to break up monopolies and oligarchies to protect consumers and promote fair competition. The Progressive Era saw presidents such as Theodore Roosevelt and William Howard Taft take on these trusts through litigation and regulatory measures to prevent the concentration of power in a few large corporations.