For one thing, the gap between the Senate primary and the Cruz-Dewhurst runoff was nine weeks long.  Previously, the longest such gap between a primary and runoff election in Texas had been a mere five weeks. Cruz used the 63 days effectively, drumming up money and free media. Second, victories like his are actually the norm in Texas, where, including Tuesday's results, the second-place finisher in a state primary has gone on to win the ensuing runoff election nine out of fifteen times.

"He was the man versus Dewhurst, who's part of the machine, the establishment there in Texas and in Washington, D.C.," said Sarah Palin on Tuesday night's episode of "On the Record with Greta Van Susteren." "He was the outsider to come in and promise that reform."

Yet Cruz was no ordinary Tea Party figure, and few people's idea of a Beltway outsider. He attended Harvard University's law school and founded a Latino law review there; clerked at the U.S.