"You can never speak for the President of the United States. But, you never know. There's a window of opportunity. We will not shut that window. There's a glimmer of hope. You would hope that he could go," the mayor said, according to the Chicago Sun-Times.
The White House annouced last week that First Lady Michelle Obama would make the trip instead. The First Lady will travel with Senior White House adviser Valerie Jarrett and, possibly, Oprah Winfrey – if she’s asked.
International Olympic Committee member Dick Pound said Monday that the president's absence would be "noted."
Asked if he thought Obama’s absence could hurt the city’s bid, Daley said "everybody is cognizant of that."
The first couple will host an event for Chicago's bid at the White House on Wednesday.
Full Coverage: Chicago's 2016 Olympic Bid