Mark Kirk

FILE – In this April 19, 2010 file photo, Illinois Republican Senate candidate, Rep. Mark Kirk, R-Ill., responds to a question during a news conference in Chicago. Republicans are on offense in scores of House and Senate races nationwide amid persistent economic woes and lukewarm support for President Barack Obama. Democratic seats in Illinois and Delaware, once held by Obama and Vice President Joe Biden, respectively, are in jeopardy, too. (AP Photo/Charles Rex Arbogast, File)