A massive 8-point swing just confirms that it's more likely Marquette got a pretty pro-Republican sample rather than real movement in both races.
Marquette is the gold standard for polling Wisconsin, though I am not sure if they also poll New Hampshire.
I suspect Feingold will probably end up winning 52-47 or something like that in the end. The polls showing him up by huge margins were always going to be wrong. Still, that last ~5% or so is going to be difficult for Johnson to find a way to get.
