Cruz Surging in Iowa

Ted Cruz seems to be surging in Iowa, according to the latest PPP poll.  He does have a very strong organization there so it's not that much of a shock.  Also, like Carson, he has that evangelical fervor, but unlike Carson, he actually knows what he is talking about.  Rubio may be more electable, but I think Cruz is just a higher quality candidate in terms of thinking things through (though I'm not really a fan of his tax plan) while still holding on to ideals.  Anyway, what I thought was most interesting from the PPP poll was the fact that Cruz is getting 34% of Tea Party support and Marco Rubio is getting 1%:

Isn't Rubio supposed to be a candidate who unites the establishment and grassroots because of his nearly flawless conservative/libertarian record in Congress (he has a 93% lifetime score from Club for Growth and 98% from the ACU) and the fact that he was a Tea Party candidate against Charlie Crist in 2010?  For jeebus sake, Jeb Bush gets more Tea Party support in this poll than he is getting.  It might just be statistical randomness but it's still quite amazing.