Vox discusses why some of the GOP elite seem to prefer Trump to Cruz. They get it dead wrong. The reason the Bob Dole wing of the Republican party prefers Donald Trump over Ted Cruz is simple. Trump can't win, Cruz possibly could.
The calculation is this: Trump on the top of the ballot guarantees that Hillary Clinton (or Berni Sanders) becomes president and likely gives control of congress back to the Democrats. Dole et al think that the Republican party can survive that over the long term.
On the other hand, a Cruz candidacy is likely to create the same effect, but there is a small chance that Cruz could win. A Cruz presidency would wreck the economy for a generation. It would be a disaster of diplomacy. The nation would almost certainly enter into at least one new war. Our allies would possibly abandon us. We would come very close to becoming a failed state. And no other Republican could be elected president in generations.
That is their fear. It is a rational fear.