by Emily Swanson Rasmussen 4/5/10; 500 likely voters, 4.5% margin of error Mode: Automated phone ( Rasmussen release ) Illinois 2010 Senate 46% Kirk (R), 40% Giannoulias (D) Favorable / Unfavorable Mark Kirk: 51 / 36 Alexi Giannoulias: 42 / 44

Original post:
IL: 2010 Sen (Rasmussen 4/5)