While the Trump administration suffered a trio of defeats in court on its various attempts to squeeze, slow, and/or stop immigration, these decisions are only short-term protections for immigrants, and they don’t ensure that America will have an immigration policy that meets its economic, demographic, and moral needs.
For the time being, the courts can and should block immigration policies by the Trump administration that violate the law or the Constitution, or abuse their power. But in the long term, only Congressional action can ensure a productive, fair, welcoming, and mutually beneficial immigration policy for the United States. The sooner, the better.