The media and social media are geared towards reinforcing tribalism. You have to pick a team and anyone on the other team is your enemy. It works well as a means of driving engagement and making money at the expense of having an electorate that is informed.

It reminds me of the town hall Bernie Sanders did on Fox News a few years ago. If you strip away the partisan blinkers and have a debate based on facts, specific policy points, and focusing on trying to improve people's lives instead of scoring cheap points then more people agree than disagree, regardless of political affiliation.

I guess the question is, "who benefits from a divided electorate?"