sentences:  On March 14, 2007, Preckwinkle joined four other South Side aldermen in voting against a $500 million public-funded guarantee to back up Chicago's Olympics bid.But on September 9, 2009, Preckwinkle voted to authorize Mayor Richard Daley to sign the International Olympic Committee's host city contract, which included financial guarantees putting full responsibility for the Olympics and its proposed $4.8 billion operating budget on taxpayers.Preckwinkle announced in January 2009, that she would run for President of the Cook County Board.