Increasingly, we Americans occupy alternate universes, with very little common ground -- only battling perceptions of reality. A Pew study finds 81% of voters say .
In this TEDx talk in Miami, Columbia University Professor Peter T. Coleman explains why politics in the US are more deadlocked and polarized today than they .
Description.
Lilliana Mason (University of Maryland) about polarization in American politics. Why are Democrat and Republican voters nowadays so devided? And what does .