gallup poll 42%, 51% disapproving. but in almost every category, the president's policies are unpopular. so how will history evaluate him? joining us now from washington, drickman and jane hampton cook, a presidential historian has written two recent books, american star spangled story and american phoenix. all right, after about six years where president obama has had a turbulent time, particularly in the last two years, how do you see him ranking? >> i think he'll rank ultimately in the bottom 20, maybe the bottom 15, depending on the choices that he makes with isis. >> why is that so important? >> well, because isis, we don't know how great a threat that they are. and if we have another 9/11 or if we have even an iranian hostage crisis, i think that will really decrease his ranking if things go really bad. >> all right. so if the terrorism strikes the united states, obviously any sitting president would take a hit. mr. lickman, dr. lichtman, how do you see it? >> i think she is misguided in many ways. number one, legacies drastically change over time. you can't judge them at the moment. harry truman had 22% approval rating in his last year, half of tha