They're sort of news. Very select news.
I find both shows fascinating, and sort of comforting in a way -when you live somewhere like NZ, where our politics only cover the spectrum between 'Very slightly left of centre' and 'very slightly right of centre', American politics (particularly the conservative/republican side) can seem downright psychotic - it's nice to know that there are people out there calling the crazy shit out.
Also, where did anyone get the impression that the shows present themselves as 'moderate'?!? We know moderate in this country, and those shows are clearly leaning to the left. They shouldn't have to apologise for it either - there is *no such thing* as an unbiased news source. It's just not possible! That's why you have a bunch of different news sources - if you're looking for unbiased, read all the sources and mentally average them =P
Note: I am in no way calling republicans psychos. I appreciate that the particular things that the shows choose to highlight are the extremes, because they're better value to lampoon.