South Carolina Sen. Jim DeMint made his fourth Senate primary endorsement today, throwing his support behind Indiana state Sen. Marlin Stutzman over two other Republicans with Washington experience.

DeMint was the first senator to back Marco Rubio in Florida over Gov. Charlie Crist. He also endorsed Chuck DeVore in California over national party favorite Carly Fiorina and Pat Toomey in Pennsylvania before Sen. Arlen Specter switched to the Democratic Party.

Stutzman also received help Friday from RedState.com's Erick Erickson, who called on conservative activists to get involved before the May 4 primary.

"Time's up conservatives. We must now unite and we must now rally to save Indiana from the Democrats," Erickson wrote. "Now, like in Florida, we must save the NRSC from itself and save Indiana from the Democrats."

Both former Sen. Dan Coats and former Rep. John Hostettler poll better against Democratic Rep. Brad Ellsworth, but DeMint told FOX News "we need new faces here."

"We can raise some money, " DeMint added, "and we're going to do that with a money bomb over the next week, try to draw some attention."

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