Cruz, 42, arrived in Washington in January as the ultimate conservative purist, a hero to both salt-of-the-earth Tea Partiers and clubby GOP think-tankers, and since then he has come to the reluctant but unavoidable conclusion that he is simply more intelligent, more principled, more right—in both senses of the word—than pretty much everyone else in our nation's capital. That alone isn't so outrageous for the Senate. "Every one of these guys thinks he's the smartest guy in the room," one senior Democratic aide told me. "But Cruz is utterly incapable of cloaking it in any kind of collegiality. He's just so brazen."
The article is rich in detail and examples of what Zengerle calls Cruz's "humble-bragging stories."
[Interesting sidenote: Josh Marshall, who attended Princeton when Cruz did, share's an interesting personal story.]