He's almost certainly a narcissist in the clinical sense of the word, so his outward appearance and status is enormous to him. Just look at how often he mentions people "laughing at us"; he's obviously deeply concerned about how people view him.
I'd have considered voting for any Republican other than Trump or Cruz. I probably wouldn't have, but I would have been a lot more likely to just stay home.
Then again, my state is 100% going to go blue so it doesn't matter anyway.