This presidential election is missing one of TV journalism’s all-time big beasts, Tim Russert, and NBC is still scrambling to find someone substantial enough to fill his shoes. The New York Times reports the NBC brass is hardly thinking outside the box. Katie Couric, Brian Williams, and Tom Brokaw are in the frame, and there is even a suggestion the Lehrer Newshour’s Glen Ifill, a Meet the Press regular, might be the right pick. The dark horse? Chuck Todd, NBC News’ omniscient flame-haired political director. The decision, it is said, will be made before inauguration day.