You’re correct about turnout. I don’t recall the exact numbers but because Republicans were faced with losers like McCain and Romney there were millions less votes cast than there were when Bush won twice.
I predict that many of us who hate Trump or hate Cruz will be too bitterly upset to vote at all when one (or even both) of them fail to make it to November.
I hope those who hate Trump and/or Cruz can still “get out and vote.” Hillary MUST be stopped. Our Republic is hanging by a thread.