It's not... Has happened a bunch of times. Fox News may be a Republican/Populistic propaganda machine, but somes times, the hosts can't take it.
Even Bill O'Reilly did a great interview with Sarah Palin during the 2008 election, calling her out on all her BS.
Ofcourse, Hannity or Hume and the likes would never do that. They just follow the republican line. Folks like Bill O really do consider them selves smart scholars, and though they are willing to follow the party line most of the time, sometimes they just cannot allow them selves to follow the line.
Edited by rbp, : No reason given.