 However, Biggert opted to run for re-election in the 11th District, the successor to the old 13th.The old 5th is only slightly less Democratic than its predecessor; Obama won the district in 2008 with 70% (down three points from the old 5th), and 2010 Democratic U.S. Senate nominee Alexi Giannoulias carried it with 55% of the vote.No Democrat has filed to run against him.