Thanks for taking the time to clarify your position.

So if China or some other country decided to send 10 million people here for whatever reason, you think our official policy should be to welcome then in and provide them food, shelter, etc...?

What about 100 million people?

Should they also be given citizenship and right to vote in addition to food/shelter?

The only issue would be logistics. Getting supporting infrastructure and housing set up. But yeah, ultimately. More hands, more consumers. Why wouldn't we want as many citizens as possible, we certainly have the land for it.

I wonder in such a case if more populous countries like India or China could in theory send over 100 million+ people to our country over the course of a decade, and then once those people are citizens, legally vote for the US to be annexed by China, etc..

You could conquer a country without a single shot fired.

Yeah, sure, if Chinese people were ants in a hivemind that strategy might work.

Putting aside the blatant unconstitutionality of the question, how often does "should the US be legally annexed by China" come up on the ballot?

Another hypothetical is what if those 100 million turn out to be right wing radicals.