<p>The London School of Economics ranking is in fact way off. Below are some excellent Political Science (not International Relations) departments:</p>
<p>Duke University
Massachusetts Institute of Technology
New York University
Northwestern University
Ohio State University-Columbus
Stanford University
University of California-Berkeley
University of California-Los Angeles
University of California-San Diego
University of Chicago
University of Michigan-Ann Arbor
University of Minnesota-Twin Cities
University of North Carolina-Chapel Hill
University of Rochester
University of Texas-Austin
University of Virginia
University of Wisconsin-Madison
Washington University-St Louis</p>
<p>Some LACs with good Political Science departments:
Amherst College
Bates College
Bowdoin College
Claremont McKenna College
Clark University
Colby College
Colgate University
Colorado College
Connecticut College
Davidson College
Haverford College
Kenyon College
Macalester College
Middlebury College
Oberlin College
Pomona College
Swarthmore College
Trinity College (CT)
Union College
Vassar College
Washington and Lee University
Wesleyan University
Williams College</p>