Well because most Americans are not dissuaded by the news.
ok, why is that Manuel? here goes...
1. Most people are aware of media bias (google a gallup poll)
2. Family ties, not media, are main dictators of political preference.
If you don't like the media; change the channel; Why do you thin FOX is doing so well?
It's not something that your subjected to like ultra-liberal college professors.
oop; here it comes...Universities have no political bias!