Check this out. It is painful for me to put a link up to a study done by UCLA with help from folks at Mizzou...I have family who are USC and Kansas grads.
But, it is an interesting read that quantifies things for us.
"The trouble with our liberal friends is not that they are ignorant, but that they know so much that isn't so. " Reagan
"Now more than ever before,the people are responsible for the character of their Congress.If that body be ignorant, reckless and corrupt, it is because the people tolerate ignorance, recklessness and corruption."Garfield