Josh Marshall has a pretty good analysis from a couple of emailers on why CNN and everyone else kept playing the shit Bush clip all day. I really wondered this myself as even I (the big bush basher that I am) didn't really see it as that big a deal, just kinda funny:
....People ask why the U.S. is in the midst of this crisis. This recording provides a simplistic but understandable answer. While none of the major media will directly offer this intepretation, I think it's clear that they feel that this brief clip captures a president who does not look emotionally or intellectually capable of leading in this crisis....
A reader disagrees on CNN's fronting the Bush remarks