I haven't really been paying attention to the races so I can't speak to who will win or won't
but what I do see is still alot of outrage directed at the GOP and at Obama, but not so much at the Democrats in general.
Midterms traditionally show a shift in power during bad times but I just don't see it being that big - especially if the GOP factions are mad that the tea party is or isn't represented
Here's the score in Montana as I see it.
For the Senate Daines will probably get the seat. Walsh, who was a hand picked clone of Harry Reid, is out due to plagiarism among other things. Curtis, his replacement, was picked in Democrat convention and is against everything. She is anti-gun, anti-capitalism, anti-men, etc. In other words she is against everything except more socialism.
For the House it's a toss up. Zinke is a Republican establishment pick. Lewis is a Democrat establishment pick. There's not a lot of difference between the two. It really will be a flip of the quarter as to which one gets the seat.