Obama is not say “old” fish, he said “stinky” fish. There’s a difference. It makes your point even more clear.
No he said "you can wrap an old fish in a piece of paper, call it change, you know, its still going to stink."
Palin: Lipstick on a pig McCain: an old fish
You tube:
http://www.youtube.com/watch?v=QeKinyvqh0U