It goes the other way too. Cruzies think Trump voters are all going to vote for him. There's going to be many who won't vote for Cruz and not to mention all of the crossovers and independent voters that will be lost.
Ok you are just not seeing it.
Hopefully, we end with stronger ticket than Trump/kasich.
If not, I am sure Cruz would be blamed for Trump’s loss in the fall.
Trump had also trashed Rand Paul as well. Paul needs help this fall in his senate run.