Some of them, yes. The key dynamic in the upcoming election, however, is whether or not conservatives have a reason to show up in droves.
I take all of the stories about disillusioned democrats with a grain of salt. I know far too many of them, and they are not the most rational people. Even in the face of personal cost, they will twist themselves (or allow themselves to be twisted) in whatever way is necessary to rationalize a Democratic vote. I have already heard liberals that I know say that the only problem with ObamaCare is that the Republicans made sure that the insurance companies could gouge us. I don’t know how widespread that kind of sentiment is, but I suspect it will become widespread over the coming months.
If Democratic voters do turn or stay home, great. I am just not expecting it, at all.
This is a non-presidential election, so turnout will favor the Party out of power.