The US has failing infrastructure, stagnant wages, high inflation, high crime rates and an over burdened and extortionately expensive healthcare system.
What about those factors speaks to more capacity? If you replaced every economic migrant with a genuine refugee there would be far more humanitarian benefit overall.
Just to clear this up because of the obvious US defaultism, Im not from the USA.
None of what you have said changes the fact that if genuine refugee intake was increased and replaced economic migrants there would be a net benefit to humanity in reducing human suffering.