She has done a pretty good job of killing all her possible opponents in the cradle, leaving a sparse crop should she have to decide not to run. Personally I don't think her or Bill's ego will allow her not to, at this point. She honestly believes that "Trust me" BS will fly.
The Dems would have a great chance if they ran a conservative, broadly-appealing candidate like Manchin, especially against someone a lot of voters on the Right don't really like such as Jeb, but since the farthest left of the base will be the most active in the primaries, there is zero chance of that happening.