and in their final debate of the year a concentrated on the issues most americans are concerned about right now, national security and terrorism. there was also plenty of criticism, as you would imagine, of president obama and hillary clinton. >> front-runner donald trump said that he knew he was going to be attacked last night. jeb bush did exactly that. >> am i talking or are you talking, jeb? >> i'm talking right now. i'm talking. >> you can go back. you're not talking. you interrupted me, jeb. are you going to apologize, jeb? no. am i allowed to finish? >> one at a time. go ahead, mr. trump. >> a little of your medicine there.