crisis proposed it to be a panel of doctors. the fact that there's a history and debates to read, i think it's really interesting. and i think just sort of a geeky point here of something new -- >> they all are. go ahead. >> -- it's remarkable. i think the middle of the 60 we had some constitutional framers who foresaw a moment where possibly a presidential inability -- a presidential disability would actually be disabling. and i think that we have a mechanism. >> mike barnicle, i would love to have a followup question with john meacham to ask what happened in the mid 60s that led many to move for the passing of the fifth amendment, but unfortunately we only have two hours and 50 minutes left. i'm going to let you go to richard haas for the next question. >> that was great.