Two more things I was thinking about this morning with regards to the OP's question.

First of all, those on both sides like to point out the extremists on the opposite side and try to make the case that this is the norm for that side.

The democrats are all socialist and want to turn us into a totally socialist or, even worst, communist society. Are there some on that side that believe in this? Of course there are, but they are in the minority. The conservative news media and websites will always show these extremists and try to make the case that they are the base of the party.

The same thing for the other side when they claim that conservatives are all knuckle dragging racists who only want to see big business succeed and the average people be poor. There are probably a few on the extreme right that have this attitude, but it is in no way the middle ground of the republican party.

The other thing is that once an election has taken place, the losing side nitpicks all kinds of ridiculous things that have little or nothing to do with policies that will help us be a better country. Obama is a Muslim, Trump hasn't shown his tax returns. Really? Are these the issues that we should be trying to resolve?

A picture of President Obama bowing to a foreign leader and the fact that President Trump mistakenly said 7/11 when he meant 9/11.

These are absurd issues that can simple be explained by the fact that presidents are human beings and not perfect. Everyone mis-speaks and has mis-steps. People focus on those things simply to try to tear down the other side as opposed to working on real solutions to problems.

Until this kind of nonsense stops, we'll remain partisan and probably become even more partisan.