Thanks to Eliot Cutler (who ran as an independent both in 2010 and 2014), LePage was able to pull through both times. Mills won't have to worry about Cutler this year--he's facing jail time for child pornography charges.
Libby Mitchell, the Dem. nominee in 2010, was the one in the spoiler role. She got 19%, Cutler 36%, Lepage 38%. Now that we know about Cutler's child porn charges though, it's gross to think he came so close to getting elected.
I agree with the assessment above that this is lean D but with upset potential.