DC Talks and Special Events
For me, finding an internship that would allow me to attend special events in DC like conferences think-tank talks, Supreme Court hearings and Senate hearings was really important. And, while I may have stuck gold with finding a flexible and understanding internship supervisor, there is really so much going on in DC that there will always be an opportunity to attend interesting events - and if you develop a strong enough reputation in your office you may be able to ask for a morning off.
There is a lot to learn in DC and a lot of brilliant people wanting to share their knowledge. In addition to listening to great speakers, DC events are great networking opportunities. When you do meet great people, don't be shy about being a CMC student - DC maybe the only place outside of Claremont where CMC is a recognized and respected institution.