I someone who has done different degrees in philosophy, poli sci, and religion, I think you can find a number of schools that fulfil your requirements, both in philosophy and political science.
You may want to do an MA in in Phil or poli thought the meantime to figure out more about your academic interests.
For more mid-ranked schools, check out MA and phd programs at St. Johns Annapolis, The New School in NYC, Stony Brook, philosophy at Milwaukee.
At the high end, WashU Political Science, Chicago political science, social thought or philosophy could all possibly fit the bill. They also have the MAPS and MAPH MA programs, which let you take any courses you want in the university. Some things of interest in poli sci at Yale or Duke
Other things out there as well.
Best of luck to you!