November 22 was the deadline for candidates for Mayor of Chicago to file petitions. The city requires 12,500 valid signatures. The race is non-partisan. Because no incumbent is running, there are far more candidates than normal. It appears that eleven candidates submitted petitions, although it is too early to know how many of them have at least 12,500 signatures. Under Illinois law, a petition is deemed to be valid, even if it has only one signature, if no one challenges it.
The Chicago election is on February 22, 2011. Chicago requires far more signatures to run for Mayor than any other city in the United States. The new, lower petition requirement to run for Mayor of New York city is 3,750, whether the candidate is running in a party primary or petitioning directly for the general election.