@revelette2,
An interview is not the same as a press conference though. In principle/theory*, at a press conference anyone can ask a question. With an interview, a politician can carefully select which exact journalist/host they want to talk to. Preferably one who will be friendly to them..
*Of course, in practice, the politician or their PR flack can do quite a bit of picking when it comes to who gets to ask a question at a press conference too.. Still, at least a bunch of journos from different media (with different angles) will usually get one.