Perry could be the one to challenge Cruz. Perry could raise the money and I think he is still more popular than Cruz is.
Perry: “I Don’t Think You Have a Heart” If You Oppose In-State Tuition for Children of Illegal Immigrants
http://www.weeklystandard.com/perry-i-dont-think-you-have-a-heart-if-you-oppose-in-state-tuition-for-children-of-illegal-immigrants/article/594080