Where ? If you mean various news outlets only having one sided opinions you have to realize most of cable news is entertainment and is all about the ratings. That's not a left or right thing that's a profit thing. In fact you can see this happening at msnbc now. It's considered the most left of all the news outlets so it's no surprise they hired a couple of center right people from Fox. It's all about getting more viewers
The fact that they have to hire ex-fox employees is a sad testament to a larger problem.
The polarisation of the left and right has only served to radicalise both ideologies, and thinking about what might come next frightens me.