[InterceptPoint]

But what earthly reason would Cruz have for accepting the offer?

Assuming you believe in Trump as President you should anticipate 8 years of great progress, low unemployment, rapid growth in income and the subsequent solidification of the GOP voter base. If so, another 4 or 8 years of GOP rule should be a cinch. And Vice President Cruz would coast to the nomination.

Seems to me. But of course Cruz might make a somewhat less optimistic calculation.

[DoodleDawg]

And Vice President Cruz would coast to the nomination.

But not to the presidency. Not if history is any indication.