Fox news is a necessity.
There are posts on the web that give the highlights of everything worthwhile on Fox News. Your requirements for necessity" are no doubt larger than mine. I can listen to Glenn Beck on the radio, and O'Reilly became a non-necessity when he began going over the top fair-and-balanced toward Obama's agenda (more often than not giving him the benefit of the doubt). The only one I miss on Fox News is Neil Cavuto.