The science of Donald Trump’s allure

The psychology of why Donald Trump is riding high in the polls.

DES MOINES, IA - AUGUST 15: Republican presidential candidate Donald Trump campaigns at the Iowa State Fair on August 15, 2015 in Des Moines, Iowa. Presidential candidates are addressing attendees at the Iowa State Fair on the Des Moines Register Presidential Soapbox stage and touring the fairgrounds. The State Fair runs through August 23. (Photo by Win McNamee/Getty Images)