He is at 13% now and needs only to be at 15% to enter the national spotlight of increased media coverage and access to the general debates. His polling numbers are increasing with a notable momentum as general support of the Republican candidate and Democratic candidate are both at all time lows.
As long as the majority of voters think of Trump as a broke racist narcissist and Clinton as an apathetic or unethical elitist he may well have a chance.
http://heatst.com/politics/gary-johnsons-polling-numbers-rea...