Friedman is absolutely right about this:

The American political system was, as the saying goes, “designed by geniuses so it could be run by idiots.” But a cocktail of political and technological trends have converged in the last decade that are making it possible for the idiots of all political stripes to overwhelm and paralyze the genius of our system.

Those factors are: the wild excess of money in politics; the gerrymandering of political districts, making them permanently Republican or Democratic and erasing the political middle; a 24/7 cable news cycle that makes all politics a daily battle of tactics that overwhelm strategic thinking; and a blogosphere that at its best enriches our debates, adding new checks on the establishment, and at its worst coarsens our debates to a whole new level, giving a new power to anonymous slanderers to send lies around the world.

I think that structural change in political districts is the most serious issue of all those that he lists; the underlying problem is that there is a shrinking number of politicians who need the moderate center.