The following sources may help you identify a policy issue of current interest and begin to get a sense of the public debate surrounding it. Make note of specific events and legislation, key legislators and other interested parties (think tanks, advocacy groups, etc.), as well as such important publications as major studies, reports and position papers.
Literature reviews are a particularly useful kind of journal article when doing research. They address the issues involved in a particular question and the debates among scholars. They map out the intellectual terrain succinctly for a topic and give you the major landmarks in terms of key authors and significant titles for greater understanding.