New Rasmussen poll of the Illinois Senate race shows Republican Mark Kirk edging out his most likely Democratic foe, State Treasurer Alexi Giannoulias, by three points (41 to 38) with 17% undecided.

Kirk fares much better when matched up against the other possible Democrat, Cheryle Jackson. Kirk leads Jackson 47 to 30, again with 17% undecided.

Also from the poll: Barack Obama's approval rating is 56%.  48% of voters favor "the health care reform plan proposed by President Obama and the congressional Democrats" (including 29% who "strongly" favor it) while 48% of voters oppose the plan (including 39% who "strongly oppose it).

--------------------------------------------
Follow the RCP Blog on Twitter.
Become a fan of RCP on Facebook.
--------------------------------------------