Mayor Daley and members of the bid team returned to Chicago Saturday. The mayor said he was disappointed with the loss but wouldn't second- guess the effort.
However, there is a debate about whether President Obama should have gone to Copenhagen, and whether he was hurt politically by the fourth place showing.
"It's never a mistake for the president of the United States to fight and compete on behalf of our country, and that's what he did. He would do it again in a nano-second," said Susan Rice, U.S. ambassador to the United Nations.
