Both campaigns plan to deploy popular surrogates — people such as South Carolina Gov. Nikki Haley for Rubio and “Duck Dynasty” patriarch Phil Robertson for Cruz — on the campaign trail.

Kellyanne Conway, president of Keep the Promise I, one of the leading pro-Cruz super PACs, said her group plans to advertise in Arkansas, Georgia, Tennessee and Virginia, with Alabama and Oklahoma also in the mix. The super PAC will air positive ads about Cruz, and its negative ads will focus more on Rubio than on Trump, Conway said. That includes new spots.

“We’ve got a series on Rubio that I would call ‘chronic absenteeism’ — looking at how he’s missed votes on Planned Parenthood funding, funding for the military, about how he got himself on a 9/11 committee and didn’t attend,” Conway said.