I guess The Donald will be spending a lot of time in Denver and environs. That appears to be the only viable path left to him at the moment. Well, I guess there is NH perhaps. Don't tell TN that I mentioned NH!
I think Wisconsin is the better option than Colorado. Even Nevada I see going to Clinton as long as the poll aggregate is within a point or two favoring Trump. New Hampshire is possible as well but you need either Nevada, Colorado or Wisconsin along with it. Michigan I am not as concerned about. Overall, I am expecting some swing back to Clinton from Johnson/Stein among core anti-trump voters. This will help Hillary more in Colorado and even Nevada than among working class whites.