Of course, the fact that this chart seems surprising is one of Walker’s big strengths. He may be as conservative as, say, Ted Cruz or Rand Paul, but he doesn’t seem as conservative. He doesn’t have Cruz’s bombast and he doesn’t go around hinting that we should go back to the gold standard, like Rand Paul. In practice, that may put him closer to the center of the field than his actual positions warrant.

Still, McDaniel’s data is worth taking note of. If Walker remains hardnosed in his views, it may be hard to hide this from the voters. Eventually he’s going to say something that will cause the Jeb Bushes and Chris Christies to pounce, and that might expose him as too much of an ideologue to win the mainstream Republican vote. It all depends on how well he learns to dog whistle and tap dance at the same time. But then, that’s true of everyone running for president, isn’t it?