A CITY AT WAR: CHICAGO tells the story of the most significant events that occurred in Chicagoland during World War II and explores the mutually beneficial relationship between FDR and Chicago mayor Ed Kelly. With Roosevelt’s help, the original “Big City Boss” strengthened his political machine by moving thousands of African Americans from the party of Abraham Lincoln to the Democratic voter rolls. African Americans and the city’s many other communities, worked together like never before to ensure the Allied victory.