I am for free travel and work across "national" boundaries. That means I think the U.S. should be welcoming to others, and we should try to work out deals where our citizens can work abroad.

I believe that the best way to avoid war is to invite everyone to the table, help everyone get richer, do better, be more invested in a peaceful world. In the modern world, war is a nightmare solution.

Without immigration the US population would be shrinking. So, we need an endless supply of new immigrants to avoid a host of problems now facing Japan.

Second we directly befit from a mix of immigrants from all nations.

> At what point do you feel the USA will have enough immigrants?

When net migration into and out of the US approaches zero. Until that point it's about how fast we can acculturate newcomers, which judging from history is "pretty damn fast".

> At what point do you feel the USA will have enough immigrants?

What does "enough immigrants" even mean?