Olympic Committee Poised to Vote on 2016

The first lady of the United States - and the first lady of talk TV, Oprah, - are just two of the mega-watt stars supporting Chicago's high-stakes Olympics bid.

There are 101 delegates who will vote, and four cities to choose from: Chicago, Rio de Janeiro, Tokyo and Madrid.

Chicago and Rio are the favorites, reports CBS News correspondent Shelia MacVicar. In Rios' favor- there's never been an Olympic games south of Mexico City. In Chicago's - there's the potential for a spectacular venue on the lakefront.

"Everything about this bid speaks to what this city has to officer," Michelle Obama said.

This is a race where the winner may be decided by only a vote or two - so every vote is being wooed.

The days of Olympic corruption and bribery are gone - in their place - the celebrity lobbyist.

So Thursday night in Copenhagen, those 101 delegates were being courted by presidents and prime ministers, a king and queen, the first lady of course, and Friday, President Obama himself.

In the four hours he'll spend on the ground campaigning here, supporters of the Chicago bid hope that he will become the deal-clincher-in-chief.

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2016 Olympics: Chicagoans Split on Games
2016 Olympics' First Event - Lobbying
Obama's Olympic Pitch Draws GOP Complaint
Tokyo Pitches a "Green Olympics"

Obama to Front Chicago's Olympics Bid
Rio's 2016 Olympic Bid Gets Boost