No show creatted by Gene Rodenberry is purposely conservative.
The Star Trek series (ST, TNG, Voyager) were some of the most liberal programing I've seen. (No money, multi-culturalism, benevolent government, entitre planets of hipiess...)
The newer series, Earth Final Conflict and Andromeda have more conservative themes, probably because Rodenberry isn't around anymore. In EFC, we have the world governments and police collaborating with the "benevolent aliens", who are really colonialists.
Andromeda is more complex. It is multi-culti, but the systems commonwealth seemede like a fairly loose federal system. The whole concept of Republics or Commonwealth's falling is important. (I would still prefer people read Plybius and Cicero....)
The New Star Wars movies seem pretty good on this theme of the fall of a Republic into anarchy, mob rule, and despotism.
Babylon 5 was a good show and fairly conservative for Sci-fi. On the other hand, the whole Alliance thing should make us take heed.
Am in agreement re: ST series in general, excepting the first series (they were constrained by the network, as I recall, as to what they could get away with showing). That's probably just because lefty circa 65 is libertarian/conservative circa 2002.
Also agree that the only reason Adromeda gets away with being as conservative as it is, is because GR is dead. Otherwise, we'd have Dylan reasoning with the bad guys instead of dropping Nova Bombs.
And Tyr would be a Republican (somehow, he'd manage it).
Thought the 'no money' concept of ST's later incarnations idiotic. Even the Childe Cycle novels had something REPLACING currency (service contracts), not simply it's elimination. Perhaps if GR had tried to explain what exactly Federation trade was based upon, I might have paid more attention.
More series that are at least tolerable (IMHO) to libertarians/conservatives:
Special Unit 2
Enterprise
CSI
Who's Line Is It Anyway? (Carey is a self-proclaimed Libertarian)