there seems to be many faces of rand paul. i think he was very much speaking to a certain audience there. i think he wouldn't have said that if he was speaking on laura ingram show so he's got to figure out what he's going to try to be in this race. he obviously wants to be less of a hawk. whether or not that's going to play well in states like south carolina or iowa is anybody's guess. probably not. >> interesting to see. violating 11th commandment thou shall not speak illinois of a republican all right, coming up, it was possibly the most important show of david letterman's show. and who wrote some of the biggest jokes? an intern. we'll speak with her next. i try hard to get a great shape. this... i can do easily. new benefiber healthy shape helps curb cravings. it's a clear, taste-free daily supplement that's clinically proven to help keep me fuller longer.