Maybe some retired Arkansas Freepers could for a week set up shop outside and count the number of visitors that enter that hallowed hall of debauchery.
They could have a double wide mobile home put on the parking lot to use as their base of operations. Be sure to put it on stilts, so as to blend in with the liebary.
One would think that the producers of his show and Letterman's would realize that the country is predominately conservative and tailor their show's (editorials, er monologues), accordingly.
I haven't watched leno in so long, that I had forgotten that will make jokes about the other side. But as you stated when he makes jokes about Republicans they seem to be of the below the belt kind of jab.
Whatever made you think leno has ever tried to balance his show? I quit watching the jerk years ago. Johnny Carson came to so dislike leno, and not because of his politics, that he started sending jokes to Letterman.