While I shouldn't continue to indulge this nonsense during the (currently) second greatest Knick run of the millennium...
It's time to STFU about "Open Immigration" because we don't have it. Or anything close to it. Folks who swallow the lie generally correlate with low-levels of IQ and high-levels of self-hatred.
The Obama/Trump/Biden approaches to immigration are really pretty similar, pretty draconian, tiny details of difference, though, with the two Dems, thankfully, sans the overt race hatred expressed and cultivated by the orange fuck.
We don't have anything approaching Open Immigration nor will we.
However, if we did, it would be an absolute economic bonanza for the United States and cause real problems for the people-donor countries. Probably +2-4 points of GDP, save industries, save SS, save neighborhoods, save cities.