There are no cures for many personality disorders. I think we are watching The Clash of The Titanic egos right now with Trump and Cruz. Neither one is going to give up until everything has been destroyed.
From what i have read of people that have known Cruz their opinion is that Cruz is a completely driven nutcase, he is obsessed with “Ruling the world” so when he loses this one expect to see him again in 4 years and the 4 years after.
He is a power hungry, empathy lacking, lying (naturally) narcissistic sociopathic user of people.
or in simplistic terms a complete NUTCASE.
His Freeper 20% sycophantic followers need to get a grip with reality.