From Sarah Palin's Facebook page:

Honored to join Senators Ted Cruz and Mike Lee this morning in sending out a letter from the Senate Conservatives Fund to support for T.W. Shannon. T.W. is running in Oklahoma against a well-funded establishment-backed opponent, but with your help we can close the gap and send this conservative grassroots warrior to the Senate to fight for us! He's just the kind of reinforcements Ted Cruz and Mike Lee need. The grassroots won a big victory in Virginia this week, and victory begets victory. Let's use the momentum to help another great grassroots candidate.

Here's the link to support T.W.'s campaign:

Here's more about the letter: