As he notes, he's been playing the "Pox on Both Your Houses" routine for like 40 years in Washington.
There's a *factual* basis to his argument here. It is not actually all just one opinion versus another. Whatever your thoughts on it, the GOP has driven off the right edge of all known political maps in this country. The Tea Parties think that's great, I'm sure, but to contest the point is just dumb. Ignorant.