president obama didn't know the health care website was a mess until after it launched and that he didn't know the u.s. was spying on leaders like the german chancellor. is "i don't know" an acceptable answer for a u.s. president. >> it is not a consistent pog. i think you have two cross currents here. i think cabinet officers and white house officials are expected to taken a assume full responsibility as andy noted and take criticism and heat. perhaps sometimes when it is not fully justified. i think harry truman had it right. the buck stops in the oval office. i think that's the way the majority of the american people look at it. >> other presidents had said, i don't know. top staff, top aides, could say, the president doesn't know details of how a policy is being carried out, david? >> yeah, of course, that's a