Rasmussen (1/5, likely voters, 12/1 in parens):
Blanche Lincoln (D-inc): 39 (39)
Gilbert Baker (R): 51 (46)
Undecided: 7 (9)
Blanche Lincoln (D-inc): 38 (40)
Curtis Coleman (R): 48 (44)
Undecided: 9 (9)
Blanche Lincoln (D-inc): 38 (40)
Tom Cox (R): 48 (44)
Undecided: 9 (10)
Blanche Lincoln (D-inc): 39 (39)
Kim Hendren (R): 47 (46)
Undecided: 10 (9)
(MoE: ±4.5%)
Markos has already jumped upon this poll, trying to direct Lincoln's attention to the possibility of retirement. DavidNYC made a persuasive case that Democrats would be better off with Lt. Gov. Bill Halter running in Lincoln's place, and PPP will go into the field sometime during the next few weeks to test "alternatives" to Lincoln. (They'll also test alternatives to Harry Reid and Michael Bennet, but that's a discussion for another thread.)
http://www.swingstateproject.com/diary/6151/arsen-getting-uglier