Illinois Republican U.S. Senate candidate Rep. Mark Kirk laughs during the annual Coumbus Day parade, Monday, Oct. 11, 2010, in Chicago. (AP Photo/M. Spencer Green)
According to Rasmussen, Kirk has 44% of the vote, Giannoulias 40%,LeAlan Jones 4%, and other candidates garner 8%. The margin of error is +/- four points.
The race was a virtual tie last week, when Giannoulias picked up 44% of the vote to Kirk's 43%. Highlighting the closeness of this contest is the fact that Kirk and Giannoulias have now run within four points or less of each other in 10 surveys since early June. Jones' support has held steady at four percent (4%) for the last three surveys.
The candidates held their second debate Tuesday night.