He probably picks on Democrats 20% of the time. You will never see that with your head jammed up your ass.
I guess that means that only 20% of the ridiculous things out there are done by Democrats. If the Republicans stopped being so insanely ridiculous, they wouldn't be featured as much.
If you feel he is unfair in a segment, feel free to discuss that segment and make an argument against what is being made fun of. Until then, all you have is sour grapes that there are more insane republicans than democrats.