<sod>Illinois' congressional map was significantly altered after the 2010 census.  Manzullo's district was significantly altered.  While it retained his home in [[Ogle County]], it lost most of its western portion to the 17th district.  This included more than half of Rockford, which had anchored the district and its predecessors for a century and a half.  The 16th was pushed well to the east, and now stretched from the Wisconsin border to the Indiana border, essentially wrapping around the [[collar counties]].  The new map placed him in the same district as the one-term incumbent of the old [[Illinois's 11th congressional district|11th district]], fellow Republican [[Adam Kinzinger]].  Geographically, it was more Manzullo's district than Kinzinger's.  The new 16th included roughly 44 percent of Manzullo's former territory and only 31 percent of Kinzinger's.{{cn|date=June 2015}}<eod>
<sod>Illinois' congressional map was significantly altered after the 2010 census.  Manzullo's district underwent some of the most dramatic changes.  While it retained his home in [[Ogle County]], it lost most of its western portion to the 17th district.  This included more than half of Rockford, which had anchored the district and its predecessors for a century and a half.  The 16th was pushed well to the east, and now stretched from the Wisconsin border to the Indiana border, essentially wrapping around the [[collar counties]].  The new map placed him in the same district as the one-term incumbent of the old [[Illinois's 11th congressional district|11th district]], fellow Republican [[Adam Kinzinger]].  Geographically, it was more Manzullo's district than Kinzinger's.  The new 16th included roughly 44 percent of Manzullo's former territory and only 31 percent of Kinzinger's.{{cn|date=June 2015}}<eod>