He doesn’t. It’s impossible.
And even if he had the Republican support, he needs much than that to win. He needs Independent support and he will never get that from those voters.
That block of voters is definitely not looking for a preacher-in-chief. The same quirkiness that appeals to tiny groups of caucuses in a smidgeon of states will be downfall in the swing-states where those votes must count.
Anyone: Name a single swing state that Ted Cruz would have a strong chance of winning.
Yep, I’ve asked several times what is Cruz’s path to 270 coming out of a contested convention, and I never get anything back but crickets. I can only assume Cruz supporters are perfectly ok with him winning the battle but losing the war.