I find usage of the term "ultra" to be a pejorative. In this instance, describing Fox News as "Ultra-conservative" is a pejorative term for liberals, whereas describing CBS as "Ultra-liberal" is a fact.
Ok, that last line was a cheap shot made for the joke, but using "Ultra-liberal" to describe an MSM outlet such as CBS (SeeBS), NBC, ABC, NYTimes, WaPo, LATimes, etc., etc. is as much a pejorative when used by conservatives.
If we think of it as a spectrum, then if you have "ultra-conservatives" shouldn't the term be "infra-liberals"?