I’ve taken it as an article of faith that Cruz was not improvidently recognized as a US citizen. Some US officer reviewed the evidence, and saw fit to issue at least a US passport. I have no need to second guess that finding.
I agree that someone saw something. It’s a thing though, to vet a candidate. Bet there are plenty of dems who will INSIST the docs are released. Cruz chose to cherry pick what docs he released, it will come up and we all know it.