I haven’t had to go thru a security clearance since the early 1960s when there was no such thing as ‘dual citizenship.’ Back then, to become an American citizen you had to renounce any other citizenship.
In those days the Q would have been: are you an American citizen? Only a Y/N answer was possible. Nowadays, I suppose they ask if you are also a citizen of any other country(ies), and what country(ies) that would be if you answered ‘yes.’
But isn’t the story that Cruz never knew he was a dual American-Canadian citizen until he started his presidential quest? And then renounced the Canadian citizenship? I thought I’d read somewhere that he didn’t know that status. But what do I know? I can’t follow all this, gets too mired down.
Yes, that is the case.
Which isn't surprising. If you're parents never brought up your dual citizenship when you were a kid, it isn't likely that you'd have given the issue much thought.
Sure, you were born in Calgary, Alberta but, so what? You were an American citizen, just like the kids born to military families overseas.