Alternate scenario.
Preibus has Bush “running” (but not really) to make his home state boy Walker look good to the base in comparison. When Bush demurs from actually running and endorses Walker, Walker then picks Rubio as VP.
The Cheap Labor Express gets its amnesty candidates.
Cruz is who the establishment of both parties is afraid of.
Fox News has already said that Walker, Rubio and Bush are O.K., they would only say that with the approval of The Cheap Labor Express.
If you can show me on which web site senator Cruz says he will not give amnesty to any illegals, and deport them all, I will instantly move him ahead of governor Walker in my preference list.