Every film you work on is different, and that's part of what it's like for anybody who works on a film, is to learn how to work with others. Learn from top to bottom. Actors have to learn how to work with the director and the director has to learn how to work with actors, and that's not just those two departments.
People who supported Obama felt like they formed a relationship, that they were being spoken to. The way that campaign worked and the way he's worked during his first term is to make people feel like he's grasping their hand, whether it's by tweeting or email, moments after an event, sometimes during an event. It makes people relate to him.