Circumstances change with time.

At one time the US government was giving away land to get citizens to go out west and settle. It was because the needs of the country were that the western territory needed to developed, which is not the case today.

Today, there seems to be a controversy about the need to have immigration controls versus come-one-come-all because that's the way the US created a population in the prosperous past.

The question is: Does the US presently need to increase it's population considering it's growing homeless population, declining middle class, and mounting deficits and social services costs?

Another important question: As the US loses a monolithic culture due to political, economic globalism, and multi-cultural schisms and divisions, accentuated with immigrants preferring their cultural identities as to becoming assimilated, what will be the new reality of America's identity?