"Republicans appear to have a real fight on their hands"

But do they?

RealClearPolitics cites this St. Norbert poll as it continues to talk as if the Walker/Neumann GOP gubernatorial primary matchup back in Wisconsin was in a dead heat.

From what I can tell, they didn't even ask Republicans specifically when they asked the question.  While Wisconsin has open primaries that permit crossover voting, I think the decisive bulk of the voters will still be Republicans.

And, from what I can tell from the universe of information that informs my political senses, if the election were held today, Scott Walker would win the primary rather decisively.