If I understand correctly, David Axelrod’s theory is that each new president is somehow or somewhat the opposite of the previous president.  He says Trump is a nut in contrast to the cool and collected Obama.  Here is a better contrast: Trump loves the United States and Obama thinks it needs to be punished.  http://www.nytimes.com/2016/01/25/opinion/campaign-stops/the-obama-theory-of-trump.html?_r=0