Unfortunately, I will have to disagree with you on this one. Can'twell is completely safe. We simply don't have any credible candidates to take her on. The only ones who might make a credible run at Senate ran this year. McKenna might one day, but he can't run that soon. Same for Rossi, win or lose.
The only way I could see her losing is if Jennifer Dunn decided to run, but Dunn clearly doesn't want to, as she just retired from the house and didn't run for Senate or Governor.
I don't know - she's not really all that well liked by her own party, especially the less-radical elements...
Don't give up hope yet. We have time. She's high on my priority list of racces for 2006.