In a 'normal' election year we might have a choice between two able politicians, both of whom have both good and bad ideas for the country.  This is not one of those; Trump is not 'normal'. I believe Donald Trump is a danger to America and to the free world.  His admiration of V. Putin should be a red flag to all. Why anyone supports him is a huge question.  
Neither Stein nor Johnson seem to have the skills needed to steer us through the next 4 years.  Voting third party is not an option for anyone who values America and our way of life.