Twitter polarizes

Previously, we used to have a national media, including newspapers and network TV, produced a fairly unidirectional message. It was like we were all forced to sit in on the same lecture, delivered by the big responsible adults who weren't supposed to favor either side. Today, we can now ignore those adults and break off into whatever little subgroups we like. We can easily listen to only the people we agree with, and the charts above show that this is in fact what seems to be happening. And that can't be good for our political dialogue.