When they ask when the walls began to crumble for the GOP establishment, politicos will point to this race. Ted Cruz, the underfunded, under-famed grassroots conservative took on the abundantly funded, well-known Texas Lieutenant Governor and won.

The Associated Press has called it for Cruz.

Grassroots from across the state banded together to push Cruz across the finish line. Last week, Senators Rand Paul, Jim DeMint, and Mike Lee, joined Sarah Palin and rallied for Cruz in Houston. The push worked: Cruz led in the polls ahead of the primary run-off and claimed victory tonight.

This latest victory is arguably the biggest victory of the tea party movement, who’ve racked up an impressive cache of wins. Each candidate ran a good race, and the primary was as negative as expected, but this is politics, and politics is a blood sport.

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