I think it's social media amplifying the divisions through targeting. I also wonder if it's culture of corruption by both political parties that is beginning to come to light? In the old days, you wouldn't read about it in the New York Times or Wall Street Journal, but now, on Twitter and other places, could could see just about anything. There is a difficult task of separating the truth from the fake news, but there is more information available, which was not available before the Internet explosion. Just my guess, though.