So far, Reps. Jim Bridenstine of Oklahoma, and Louie Gohmert and John Ratcliffe of Texas have been surrogates for Cruz at Republican debates. And Bridenstine recently hosted an event in Tulsa and did an Internet ad for the campaign pushing back against Florida Sen. Marco Rubio’s attacks on Cruz’s national security credentials.

Other lawmakers who have endorsed Cruz include Texas Reps. Randy Weber, Brian Babin, Michael Burgess and John Culberson. Reps. Jody Hice of Georgia, Sam Graves of Missouri and Dana Rohrabacher of California are also behind Cruz.

Cruz campaign aides said they expect the lawmakers backing his campaign to play a more prominent role in 2016.

“As Cruz gains more support going into the actual contests, media is more interested in hearing from our surrogates,” wrote Cruz director of rapid response Brian Phillips in an email. “So we expect them to be more out in front than they have been so far.”