Congressman Adam Smith is still accepting applications for their Tacoma office for the summer, so if you're looking for good experience it's the place to go. Many PG majors have interned (and worked) with Congressman Smith in Tacoma and DC and all have praised the experience. All majors, American politics or otherwise, should (in my opinion) do a congressional internship at some point.
http://adamsmith.house.gov/Students/internships.htm
