Interview was pretty much what I expected. You have to know what libertarianism is and have enough knowledge to elaborate about it even if you are applying for a graphic design position.
Recruiters are chill. You will meet with the director of student program as well as the directors in the departments you applied to. Student program director will ask general questions where as the departmental directors will ask more academic and policy-focused questions.
Mostly behavioral but did also ask some policy-related questions. For policy it was mainly about libertarianism and also some of the questions that were on the written application before the finalist round.