Today Chicago voters will pick a new mayor, and for the first time in 22 years, his name won't be Daley. It would also be a first for the city, no matter who wins. Rahm Emanuel, the President's former Chief of Staff, could be Chicago's first Jewish mayor. Voters could also elect their first black female mayor or the city's first Hispanic mayor. A candidate must win 50% of the votes plus one to avoid a runoff in April.