According to USNews, the top 15 colleges in political science are:
Stanford
Harvard
Princeton
Berkeley
Michigan
Yale
MIT
Columbia
San Diego
Duke
Chicago
UCLA
UNC
WashU
Cornell
NYU.
However, one needs to go beyond this. Where are they placing graduates at? What percentage of people like you are getting placed at places you'd like to work in? Are they providing enough funding for you to live there?