Donald Trump has clinched the Republican presidential nomination for the 2016 election. On issues including immigration, race, and terrorism, supporters applaud Trump for saying what many Americans think but are afraid to say, while opponents charge him with inciting bigotry and hatred. On this episode of BackStory, the Guys look at how American society and culture has shaped what topics could-- or couldn't-- be talked about, and how Americans have both celebrated and tried to restrict "politically incorrect" speech.