Haley would be my guess. Walker or Pence would be solid picks too. Cruz won't pick a moderate running mate. His biggest selling point to conservatives is ideological purity. Huntsman, Ayotte, etc. wouldn't be considered.
Of course he is running to win. You think Cruz/Huntsman would be stronger than Cruz/Walker? Nobody outside of Atlas believes Huntsman belongs anywhere near a GOP ticket. He doesn't connect with voters and his smugness is borderline obnoxious. And he clearly despises the base. Haley is the most likely, because she's charismatic, a governor, a woman, a minority, conservative and term limited.
