Nobody has mentioned birth tourism. But there appears to be a movement of birth tourism. There are reports that women from China in particular, come to America, and give birth. The baby is considered an American citizen, even though mother and baby return to China, and the baby is raised in China.
That is a huge loophole in our laws, to think that a birth tourism baby is an American citizen. Yet currently, such baby could grow up in China, then return to America as a fully recognized American citizen.
Birth tourism is a HUGE and very prosperous business. The families pay tens of thousands in cash to be here. I am somewhat sympatric as most families are very well educated and very to do. It’s very unlikely many of the children would every become a burden on the State.
At age 18 the young adult would have to choose his or her citizenship and renounce the other. Dealing with “chain migration” would solve the rest of the problem.
And what’s worse, some think those tourist citizen babies are natural born citizens eligible to be President.