From CBS2:

Mayor Daley predicted Tuesday that more than a million people would descend on Grant Park for Barack Obama's election night "celebration" and said the city has no plans to screen people entering the park.

The mayor said "everybody's talking about" the Obama celebration.

"It's gonna be surprising. There's gonna be a lot of people who will want to come down and celebrate...We hope it's a million or more. It would be wonderful."

Unless ... well, let's just say an election still needs to be held. On the logistics, since Grant Park hosts some of the biggest festivals in the country, the area should be able to handle the expected sea of people.