TRUMP'S MOST IMPORTANT ACHIEVEMENT. Experts estimate that during the Biden administration, around 9 million migrants crossed illegally into the United States and remained in the country. As illegal border crossers, they are what immigration officials call "removable," that is, subject to expulsion from the country on the grounds that they entered without authorization. The wild influx during the Biden years strained communities nationwide, burdened government budgets, caused social disruption, led to an alarming number of violent crimes, and, in general, made a mockery of U.S. immigration law. Plus, the situation is difficult to reverse; it would be exceedingly difficult, if...