Do you mean it turns out America was already great (despite still having some problems) and that’s why the whole world was flocking to it. In fact, it was so great that it was sucking up potential greatness from other countries.

Is illegal immigration a problem in Vietnam?

Is illegal immigration a real problem in US? It's a political issue for sure.

I would say a real problem is how current administration is fighting against immigrants at the moment.

Statistically, illegal immigrants behave better than american citizens. Less burden to the budget either as they are cut off from public services.

Could you unpack your argument?