In theory you are correct. What several commenters suggest is that the Super Pac that finds both Carly and Cruz acceptable must presume that each candidate serves the same interests. Do you really believe that candidates don’t coordinate with Super Pacs when there is significant staff cross-pollination and the Super Pac donors and managers have long, close relationships with the candidates they support? The lawlessness of our governing elites is one of the main reasons for grassroots anger.
true anger... but right now the GOPe has no reasonable dog in the fight, so they will throw their support and personnel behind someone... trump represents an anybody but establishment, where cruz, to them is atleast a member of the club... but cruz seems more capable of fixing the problem than someone who loves to deal.
jmho. i stand with cruz and will vote for trump, but i expect trump will let a lot of people down.