So after you turn in the application, it's time for the interview. One thing to keep in mind is that they expect you to wear a suit or at least a jacket with tie and khakis. This is something that Kristen Mallory stressed at the info session. If you're like me, you will have to borrow a lot of this stuff and maybe improvise a little (Ben Salzman's dress shoes, Kyle Shipley's tie, black baseball socks in order to have dark dressy looking socks and if anyone needs a lucky jacket contact Jason Rehhaut). But make sure you have all of this stuff ready to go for the interview.
At the interview will be members of the selection committee. For me it was Kristen Mallory, Beth Ricca, and Professor Pitney and Miller. With Beth Ricca no longer at the career services office, I'm not sure who will be taking her spot on the committee. In addition, there is also a student in the interview who has been on the program before. Different program alumni do different batches of interviews (I have heard of at least two different students sitting in on the interviews for this current semesters group of students). They will all ask you questions to expand on your application as well as completely new questions.
Once all the interviews are over, they are very good at quickly sending out the results to your campus mailbox. You will get an email when they have put the letters in your mailbox so that you know to go and check. In those letters they will also inform you if you were awarded either The Margaret Martin Brock Internship Award or the Claremont McKenna Internship Award. These are stipends that you will receive a check for once you arrive in Washington.
After that it is just up to you do decide whether or not to accept the offer.