Seriously if Trump and Cruz did this it would be a game changer. They could say that the country comes before their ambition to hold the top spot. They would both stand so far out and it would be so different that it would instantly take all other Pubbies out and let them focus on Hillary 24x7 until the election.
Then start naming a cabinet and other top positions...
They’ve already done in the rinsy GOP. The GOP just doesn’t know it yet