There is a common denominator among the crazies on the Left and the crazies on the Right.
For me it is demonstrated by the fact that two shining examples -who should logically be polar opposites- Ron Paul and Dennis Kucinich- both frequently make an identical show.
Both carry a small copy of the US Constitution which they whip out to illustrate their thinking. Both insist that their views- and only their views- are totally consistent with that document. Everyone else - and that includes the Supreme Court- is wrong.