To run for mayor, a candidate must be a Chicago resident for at least one year before the Feb. 22, 2011, election. Generally, if a candidate leaves the state for work yet retains ownership of a city property, maintains his voter registration and continues to vote absentee, he should not have a problem, according to Jim Allen, a spokesman for the Chicago Board of Elections.
That means it also won't be a problem for any of Emanuel's fellow mayoral contenders who represent Chicago districts in Congress, most notably Reps. Jesse Jackson, Jr. and Luis Gutierrez.
Chris Good is a political reporter for ABC News. He was previously an associate editor at The Atlantic and a reporter for The Hill.