source: https://news.wsu.edu/2015/09/24/study-l ... egulation/Study links U.S. polarization to TV news deregulation
Increasing American political polarization is linked to television news deregulation following the federal Telecommunications Act of 1996, according to a Washington State University study.
The Murrow researchers found that U.S. citizens have become increasingly polarized since 1996. And they found that greater use of TV news is associated with higher levels of polarization.
study: http://ijpor.oxfordjournals.org/content ... v012.short