I will give O'Reilly points for not being a complete toe-the-line Bush propagandist (like, say, Hannity). He has taken Catholic politicians who are pro-death penalty to task, for instance. Still, a gigantic douchebag, and not (just) because of his politics. Definitely an EJ. I'd lean ENTJ, but I am not certain.
Who wants to try a bottle of merc's "Extroversion Olive Oil?"
The flip side of that is "he is successful and famous, must be N!"
I don't think that the difference between conservative views and liberal views is the difference between sensing and intuiting.
But I think you can argue that preferring to spend your entire day discussing and pushing those views over a normal job where you accomplish tangible tasks could be.
To everyone who seems to be equating his arguing style with sensing, that's totally inaccurate and probably resulting from bias against SJs. You're talking about Te. All of the TJs prefer it, and it's dominant in both ENTJs and ESTJs.
Simplistic illustration: ISFP= hippie, Bill O'Reilly=polar opposite of a hippie