Chicago Mayor Rahm Emanuel failed to capture a majority of the vote last month, forcing him into a runoff. It's highlighting a divide among Democrats playing out nationally.
Charles Rex Arbogast/AP
Chicago Mayor Rahm Emanuel (center and 8th Ward Alderwoman Michelle Harris join phone bank workers Tuesday on Election Day in Chicago. Emanuel was unable to clear the 50 percent threshold in the race, triggering a runoff election against a fellow Democrat in April.
M. Spencer Green/AP