As each of the parties has moved toward ideological purity, our politics have become ever more polarized, our governing ever more paralyzed. Extremists increasingly run the show.

As each of the parties has moved toward ideological purity, our politics have become ever more polarized, our governing ever more paralyzed. Extremists increasingly run the show.
-David Gergen, CNN Senior Political Analyst, and Michael Zuckerman, Special to CNN in What’s Wrong with American Politics