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Ted Cruz's presidential campaign received a huge injection of momentum, as he picked up an unexpected victory in Iowa’s Republican caucuses Monday night.

The Texas senator beat Donald Trump and Marco Rubio, the second and third place candidates. 

Ben Carson finished in a distant fourth place and Rand Paul in fifth.

"Tonight is a victory for the grassroots. Tonight is a victory for courageous conservatives across Iowa and all across this great nation," Cruz told cheering supporters at the Iowa State Fairgrounds.

"You want to know what scares the Washington cartel?" Cruz asked. "What scares them is the old Reagan coalition is coming back together ... We’re seeing conservatives and evangelicals and Libertarians and Reagan Democrats all coming together as one, and that terrifies Washington, D.C."

Watch Cruz's speech above.

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