Go to the "Accurately Predict Human Behavior" course page, click on the "Play Video" button and watch the video. It gives you a basic intro to a method of predicting human behavior. Then take the free online course.
At that point you will be able to evaluate which of the candidates to vote for.
A couple of tips:
- Ignore all rumors
- Ignore all unproven accusations
- Look at the candidate's actions
- Look at how they treat others
- Look at how they handle others
- Look at how they react to setbacks
- Look at how they react to attacks