Thanks for the list and I agree that Pubbies should ‘target’ these senators & states.
I may not have this right, but IIRC the following have already said they’re not running in 2014, which would hopefully give Pubbies a better chance of winning those seats (if they don’t once again screw things up):
Tom Harkin - IA
Max Baucus - MT
Tim Johnson - SD
Jay Rockefeller - VA
Which is why I was very specific that ..."13 current Senate Democrat 'seats' that are up for re-election in 2014 ...