How Will Last Night Help Ted Cruz Become President in 2020?

The question I find interesting, in the wake of Ted Cruz's headline-making refusal to endorse Trump as a major speaker at "Trump's Convention," is just what Cruz's strategy here is. Here are the elements with which I'd begin in the search for an answer:

1) Cruz is a very smart guy, easily the smartest (it would seem) among the Republican face-cards;

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