Republican presidential candidate and former Florida Gov. Jeb Bush, speaking about the Islamic State at a campaign event last week at a Coca Cola bottling plant in Atlantic, Iowa, said he didn't know what the term "caliphate" meant a year ago.

"Could you ever imagine a caliphate — I didn't even know what the term meant, literally, a year ago — a caliphate the size of Indiana, garnering energy each and every day because of our inaction?" Bush said. "Recruiting Americans to go fight their fight in the caliphate, that is in Syria and Iraq, but also recruiting Americans to do harm to us here. Thousands and thousands of Internet exchanges trying to recruit people who have a delusional view of this great country of ours."