Sen. Ted Cruz, R-Texas, who has largely stayed out of the primary fray this year, stars in a new ad from Senate Conservatives Fund backing T.W. Shannon in the Oklahoma GOP primary  for Senate.  

Shannon faces Rep. James Lankford, R-Okla., and several lesser known candidates in Tuesday’s primary. Sen. Tom Coburn, R-Okla., is resigning at the end of this Congress, leaving the seat open.  

“In Oklahoma, there are a number of good Senate candidates, but T.W. Shannon is a conservative fighter,” Cruz says in the ad.  

“He has the courage to look Washington insiders in the eye, and say, ‘I don’t work for you, I work for the people of Oklahoma,’ ” Cruz goes on.  

www.youtube.com/watch?v=FT5XSLkODF8  

The 30-second ad begins running Thursday and will stay on the  air through primary day. The ad is backed by a $163,429 buy, according to SCF.  

Shannon is one of just two Senate candidates Cruz has endorsed this cycle. The Texas Senator appeared at a rally for him in April.  

The race is rated Safe Republican  by the Rothenberg Political Report/Roll Call.