Why Is Papa Pizza A Republican?

Paul Krugman has an answer of sorts, and I suppose it's plausible, though the whole notion that pizza is partisan strikes me as... ahem... un-American. (Except pizza from Papa John's, of course... now that's partisan... RWNJ-partisan! [CORRECTION: Pizza Hut is even MORE Republican than Papa John's!])

Here's Krugman:

No, really. A recent Bloomberg report noted that major pizza companies have become intensely, aggressively partisan. Pizza Hut gives a remarkable 99 percent of its money to Republicans. Other industry players serve Democrats a somewhat larger slice of the pie (sorry, couldn’t help myself), but, over all, the politics of pizza these days resemble those of, say, coal or tobacco. ...

I'd be willing to bet that if you assessed the pizza Americans eat according to a single categorization, pizza shop or grocery store, you could still detect the partisan difference. Most of the pizza I eat is from the grocer. These days, who can afford to order a fancy pizza out? Republicans, that's who! (YMMV. Just an opinion.)