As Bartlet and his staff arrive in China for a critical summit, he is still suffering from the paralyzing side-effects of MS. Meanwhile, an asteroid is headed for the U.S., leaving Josh and Leo to deal with the potential consequences. 
President Bartlet: I'm just saying, you drop me, that's a moment that follows you the rest of your life.
Leo McGary:: There are no stupid ideas. Actually there are, I don't know why people say that.