“Election stress becomes exacerbated by arguments, stories, images and video on social media that can heighten concern and frustration, particularly with thousands of comments that can range from factual to hostile or even inflammatory,” said Bufka.

In fact, the survey revealed that social media appears to affect Americans’ stress levels when it comes to the election and related topics. Nearly 4 in 10 adults (38 percent) say that political and cultural discussions on social media cause them stress. In addition, adults who use social media are more likely than adults who do not to say the election is a very or somewhat significant source of stress (54 percent vs. 45 percent, respectively).

I'm surprised that 45 percent of Americans are not stressed by the election. 

APA offers the following tips to help people manage their stress related to the election:

• If the 24-hour news cycle of claims and counterclaims from the candidates is causing you stress, limit your media consumption. Read just enough to stay informed. Turn off the newsfeed or take a digital break. Take some time for yourself, go for a walk, or spend time with friends and family doing things that you enjoy.
• Avoid getting into discussions about the election if you think they have the potential to escalate to conflict. Be cognizant of the frequency with which you’re discussing the election with friends, family members or coworkers.
• Stress and anxiety about what might happen is not productive. Channel your concerns to make a positive difference on issues you care about. Consider volunteering in your community, advocating for an issue you support or joining a local group. Remember that in addition to the presidential election, there are state and local elections taking place in many parts of the country, providing more opportunities for civic involvement.
• Whatever happens on Nov. 8, life will go on. Our political system and the three branches of government mean that we can expect a significant degree of stability immediately after a major transition of government. Avoid catastrophizing, and maintain a balanced perspective.
• Vote. In a democracy, a citizen’s voice does matter. By voting, you will hopefully feel you are taking a proactive step and participating in what for many has been a stressful election cycle. Find balanced information to learn about all the candidates and issues on your ballot (not just the presidential race), make informed decisions and wear your “I voted” sticker with pride.

Those tips are also mentioned here:

http://businessinsider.com/cope-stress-anxiety-2016-election-2016-10/

Stress measurably shortens your life:

http://sciencedirect.com/science/article/pii/004763749401529U

I'm stressed about what happens after the election.

There's no predicting what Trump will do, or what people who support him might do.

He doesn't shut down threats of violence. 

That there exists a level of disenfranchisement that makes a Trump presidency seem rational to a sizable segment of my countrymen surprises and worries me.

The Cracked piece about why Trump rose is actually quite illuminating.

http://cracked.com/blog/6-reasons-trumps-rise-that-no-one-talks-about/

http://pandawhale.com/post/73598/how-half-of-america-lost-its-fking-mind