The e-mail scandal hasn't hit yet.
The scandal broke, what, like a month ago? How long do you expect it to take?
I don't think anyone really cares who wasn't already going to vote against Walker regardless. Walker's favorability is at 49-47 with only 5% who aren't sure. For better or worse, almost everyone in Wisconsin has an opinion on Walker already, and it'd an awful lot to change it much by this point. The emails may make some campaign fodder, but the Democrats already have been saying Walker is basically Satan anyway (although Burke has stayed away from it), so I'm not sure there's really a level beyond that.