Next week, a veteran election lawyer plans to file a legal attempt to knock mayoral candidate Rahm Emanuel off the ballot for allegedly failing to meet the residency requirement to run for mayor. The issue is whether, by leasing out his house when he moved his family to Washington, D.C., to be President Obama's chief of staff, Emanuel ran afoul of the Illinois Municipal Code, which requires mayoral candidates to be residents of the towns they run in for a year before Election Day. The only exception is for active-duty members of the military.