I believe insanity is the natural state of man, and sanity is the exception.
I think you are right about that.
I think that about 1/3 are truly insane (liberal), 1/3 are sometimes insane (fence sitters and swing voters), and 1/3 are the only ones who are sane (conservatives).
A liberal would reverse the role of conservative and liberal in my analysis but the result is still the same, 2/3 are always or sometimes insane.