There are essentially three basic places to place the blame, for those who want to.
Daley
Obama (he played a minor role, but he didn’t come out looking very powerful)
USOC
I don’t see any way in hell the first two are going to let it fall anywhere other than on the last one. Daley might not be able to affect the USOC directly, but I’m pretty sure Obama can find a way.
I live in Chicago, and I’ve seen how things work here.