The O'Reilly Factor is the most-watched cable news show in the USA. As of 2009, The O'Reilly Factor averages about 3.5 million viewers a night.
The above is the URL of the official web site of the O'Reily Factor. Where you can find clips of previous episodes.
http : // en. wikipedia. org/ wiki/ The_O'Reilly_Factor
the above is the url to the wikipedia article for the O'Reilly Factor
Props to sxephil for the definition