This bit from a Charles Krauthammer column at National Review Online is spot on:
Of all the endlessly repeated conventional wisdom in today’s Washington, the most lazy, stupid, and ubiquitous is that our politics is broken. On the contrary. Our political system is working well (I make no such claims for our economy), indeed, precisely as designed — profound changes in popular will translated into law that alters the nation’s political direction.
The process has been messy, loud, disputatious, and often rancorous. So what? In the end, the system works. Exhibit A is Wisconsin. Exhibit B is Washington itself.
Krauthammer goes to observe that the only people whining about our politics being "broken" are those on the losing side of recent fights. By the way, such fighting--usually described today as "partisan bickering"--is what politics is and should be all about. If there were no differences, there would be no politics.