I have seen that, Kids say goofy stuff. Want to be Rich, Dominate world etc. Today my 7 yrs old niece told me same.
I asked her, do you feel poor ? She replied, no I am very rich and Queen of whole Universe.
It may be in the fast distant past, but I DO remember what I was like at 18 and what I might have said to the same query and it sure wasn't that I wanted to DOMINATE THE WORLD!
I was under the impression that Cruz was a constitutional scholar for 4 years at the time of that video. That is where something doesn’t fit for me.