The audience of the national news broadcasts dwindles as people turn to alternate, albeit fragmented news sources. The Internet is one such major alternative. The Internet can provide a wealth of important and useful information and much misinformation. There are few veracity filters and people are free to gravitate to sources sympathetic to their previously held beliefs without ever seeing competing perspectives. Because few people have much faith in the credibility of the national broadcast news media, there is no common set of facts, or common history, or shared perspective within which political conversation can take place.
Political discourse degenerates to citations of mutually distrusted sources.
In previous eras, newspapers were no less biased. In many cases, newspapers were mere organs of political parties. But at least we had a few widely-circulating and competing visions from different papers. The single-minded perspective of the national broadcast media leaves people with uneasy feeling that they are not aware of the whole story. For the consequent lack of political civility, we can not blame Clinton.