If you can read the language of the country you are studying, then consult the major newspapers from that country on the Internet.
Our focus on essentials has meant covering fairly broad areas in the discipline, rather than specific research paper topics. Rewrite it again.
You might research a question and discover that there does not exist any good theory in the field to offer insight into your research question.
Keep in mind the level of your audience and their political preferences.
Primary materials include official documents, government hearings, treaties, State Department bulletins, speeches, memoirs, interviews, World Bank and International Monetary Fund statistics, government statistics. If, however, you think General X should have thought that, or most likely thought that, but you have no evidence and no sources, you may not write such a statement in a scholarly paper.
There is very little in the way of reference works in political science that are sufficiently accessible that students can profitably use them to assist the pursuit of their research paper writing.