of iowa wrote a letter to president obama declaring, quote, isis and its sympathizers are growing moreau thet for all of us? here, former am bass der to the u.n., rick grenell. author of "defeating jihad" dr. sebastian gorka. i would recommend both of you to work in some national security capacity for president-elect trump. why are you smiling, rick? what is that smile about? >> i love your confidence in me, sean. that's what i love. >> both of you are being talked about. wow like that position, dr. gorka? which position would you like? >> i would take any positive ti situati -- position in national security because it would be an honor and a duty to serve mr. trump. >> you have been one of the most outspoken voices that understands defeating jihad. you wrote the book, "the winnable war," you wrote the book, taught at marine corps university, you understand warfare. this enemy is getting mightier and stronger, true? >> absolutely. look at what the obama administration said just two months ago. president obama had his isis powwow in the pentagon. the national counterterrorism center brief