Who's calling him Saint Mitt or are you making that up? And when did we call him Hitler personified or are you... Ahhh, fuck it, I know the answer to both of these...
Christ, man, your partisan shit is weak.
But I'll answer your question because you asked it and you didn't really want an answer. (And because you didn't really want an answer, I want to answer it.) First some context, I'm not a Democrat - I'm not affiliated - but he was the governor of my state for a while.
I voted for him for Governor, he was way better than his Republican predecessor, Jane Swift, and more or less better than his Democratic challenger, Shannon O'Brien. Anyway, he did a OK job. He cut taxes state-wide, but a lot of that led to shifting the burden to the towns and cities, so a lot of them had to raise taxes. Is that good or bad? I dunno. Most people here don't know either. He came up with the universal health care that my state now has. It isn't perfect, but it's better than having a bunch of uninsured folks clogging up the emergency room (which is the most expensive version of care you can get). I'd rather be in that system than be poor an uninsured in something like Alabama.
Of course, once that plan - originally from Bain Capital - got adopted by Obama, the Republican party couldn't have it... Which was weird because they proposed it... But that's another story.
Anyway, I think he's mostly looked at as a B+ or maybe A- governor. In terms of running for Presidency, I don't think he ever had a chance given demographics, but whatever. I voted for him in my state's primary. Most people from my state basically shrugged their shoulders, though, when it didn't work out.
So... I dunno. Flash forward to today. Clearly the guy had something on his conscience that made him think he ought to vote the way he did, instead of being a robot and voting the way he was told. Regardless of his position, I'd be OK with that, since I'm really OK with independent thought. That might bother you, though, since I get the vibe that you are one of those people who root for politics like they do sports teams, and without a whole lot of thought.