"... we're not living in the America of the past, where even partisans sometimes changed their views when faced with the facts. Instead, we're living in a country in which there is no longer such a thing as nonpolitical truth." - Paul Krugman
I've been going over this very same thought for some days. Political debate is so partisan now, there seems to be hardly any objective discussion, with both sides bringing their own version of reality to the table. Pick your side and pick your reality is the approach; you're with us or you're against us is the mentality. Constructive discourse and compromise aren't possible in this sort of environment.
To see the words that Krugman wraps around the very astute point above click here.