I enjoyed Jericho's brief run in spite of its leftist slant. Naturally, as a 'winger and a Sci-Fi buff I frequently have to bite my tongue against leftist cheapshots. I consider it my price of admission.
I knew the score going into the series premiere that they wouldn't be able to leave it alone and they didn't disappoint. But they did some stuff (probably inadvertently) that rebutted their own ideology.
Yes, it was revealed that our own government nuked its own citizens in a deliberate swipe at GW Bush (the current president at the time), but they failed to explicitly name names. From my admittedly biased perspective it is a far greater possibility that Øbozo would perpetrate than any Republican, and chose to view it that way (even before we knew that Øbozo would be boss). And the benevolent Republic of Texas? I thought that was hilarious.
I don't know why it failed - it was decently done escapism that didn't dwell too much on the grim realities of a post-apocalyptic America. I did long ago realize that my tastes and the tastes of the average American boob-toob viewer only connected on the slightest points of commonality.