Now for a liberal-invented-conservative that actually succeeded (from their point of view), I offer up 704 Hauser (sp). This was the comedy, circa 95, that offered a mirror image of All in the Family: the family was black, basically liberal with the standout being the conservative son, Thurgood.
I watched once, and the stereotype was pitiful. Basically, Thurgood was indeed a straw man for daddy et. al. to beat the rhetorical crap out of every week. I don't even think it lasted a season.
Similarly, some network tried to play off Limbaugh's success. They hired rampaging liberal Henry Winkler to play a bombastic conservative talk show host whose wrong thinking ways would be exposed each week by the wisdom of friends and family. I don't think it lasted a season, either.