Arkansas has Sen. Blanche Lincoln facing Lt. Gov. Bill Halter, a strong contender supported by SEIU.
Halter seems to have eeked out a poll lead of about 3%.
That's within the 4% margin of error. At this point I think the least worse scenario is for her to eke out a win today and then hopefully be totally humiliated in November by Boozman. Halter is much more leftist and dangerous IMO, should he win today.