Maybe you know him as Kumar from "Harold & Kumar," or maybe as the young Dr. Lawrence Kutner in the early seasons of "House M.D." He's also had recurring roles on "How I Met Your Mother" and "24." He was in "Van Wilder" and "Superman Returns." If you haven't seen him recently, it's because he took two years off to be President Obama's Associate Director of the White House Office of Public Engagement! What should we ask him?