Immigration policies continue to come and go with each administration.
Trump's "Remain in Mexico" policy was rescinded by Biden, and Biden's action has been upheld by the courts. This is just another example of how America's immigration policies come and go with each new administration.
Because immigration, under the last few presidents, both Democrats and Republicans, has been managed by presidential executive orders, not by legislation passed by Congress and signed by the president.
The most recent major legislative acts affecting immigration were the Immigration Reform and Control Act of 1986, the Immigration Act of 1990, and the Secure Fence Act of 2006.
None of these adequately addresses today's situation at the border or inside our borders.
All the basic questions about U.S. immigration remain open, unsettled, and controversial:
How many immigrants should we let into the country each year?
What should be the basis for allowing some people in and keeping others out?
What should be done about the millions of people living here who are not lawfully present in the U.S.?
What is the message that America needs to send to the world about immigration to this country in the 21st century?