Discuss the nature of how our government chooses WHICH policies to pursue. How does the government react to the many different conflicting interests

Discuss the nature of how our government chooses WHICH policies to pursue. How does the government react to the many different conflicting interests in our society? Are we (the people) able to exercise democratic control over political parties given the increasing power of interest groups in recent decades? Which school of thought concerning the nature of interest groups in the U.S. best describes reality?