A signal moment occurred on the night of June 27, 2019. At the Democratic presidential debate, 10 candidates were asked to raise their hands if their healthcare plans would provide coverage for “undocumented immigrants.” All 10, ranging ideologically from Joe Biden to Bernie Sanders, raised their hands. There was a time when liberals and leftists would object to unfettered immigration because it infringed on their ability to expand the welfare state. That time seemed to have gone.