 They did two big things. The remain in Mexico policy was one of them. The premise of it was that rather than extending people protection when they sought asylum at the U.S. border and letting them enter the country, as was their legal right to do, the U.S. government instead would shunt them to northern Mexico and basically say, OK, you have to wait here for however many months it takes for your case to make it through the backlogged American immigration courts.