In order
1: Walker (to kill his POTUS chances or at least damage them, because if I think if he survives he is extremely viable in 2016, plus he has ruined WI)
2: Deal (personal bias, I like his opponent and he's a corrupt fool)
3: Brownback (far right wing, and he's a so-con)
4: Snyder (Michigan is worse with him than without him)
5: LePage (He's foolish but the house/senate block most of what he does and he's good for PR fodder)
6: Parnell (not that great but not as awful and polarizing as the others, and Walker is almost a Republican anyway)
7: Scott (Charlie Crist may well be worse than this guy..)
Some evidence might be nice.