Republican Congressman Mark Kirk claims 41% support for the second month in a row in Illinois’s U.S. Senate race, while his Democratic opponent, State Treasurer Alexi Giannoulias, has lost ground.

A new Rasmussen Reports telephone survey of likely voters in the state finds Giannoulias earning 37% of the vote, down seven points from 44% a month ago. Eight percent (8%) prefer another candidate, and 13% are undecided.