Sarah Palin went "On The Record" tonight and told Greta Van Susteren that Donald Trump's immigration plan is a "shot in the arm" to constitutionalists and conservatives who want politicians to put America first.

Palin said the plan challenges other GOP presidential candidates to explain why they don't support the policies that Trump has put forward.

"Donald Trump is talking about [the] big picture here," Palin said. "When we incentivize people to come on over via any avenue, it sends the wrong message ... We're rewarding those who would take illegal action."

"He wants to stop that and certainly send the message that America comes first," Palin said.

She added that she's "so happy" to see Trump doing well in the 2016 race and connecting with the American people.

Watch the "On The Record" interview above.

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