The Chicago bid committee would make a final presentation to the IOC on October 2 this year and after a secret ballot, the IOC would announce which city gets to host the games.

On October 2, President Obama is expected to be present with the Chicago delegation in Copenhagen, Denmark when the final presentations would be made to the IOC, said Michael Murnane from a non-profit agency for Chicago's Olympic bid.

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"That is when the final vote would be made and the host city announced," he added.

The International Olympic Committee Evaluation Commission would visit Chicago between April 2 and 8 to evaluate the city's plan for the Olympic and Paralympic Games.

Later in June, a delegation from Chicago would make another presentation in IOC's headquarters in Switzerland highlighting the city's preparedness for the games.

Obama has already chipped in by providing a video message for the bid for earlier presentations to international delegates.