The Trump administration has continued its efforts to restrict immigration through a series of measures designed to limit the availability of asylum in the United States and to promote increased immigration enforcement in Mexico. In July of 2019, the Department of Homeland Security (DHS) and the Department of Justice (DOJ) promulgated an interim final rule disqualifying asylum applicants who transited through third countries without seeking protection in those countries. This rule immediately became the subject of ongoing litigation, and, in September of 2019, the Supreme Court stayed an injunction that had been issued against its enforcement, with two justices dissenting. At the international level, over the summer and early fall of 2019, threats of economic sanctions led Guatemala, El Salvador, Honduras, and Mexico to make agreements with the United States aimed at curbing unauthorized migration into the United States. Guatemala signed an agreement with the United States under which asylum applicants in the United States who had transited through Guatemala on the way could be returned to Guatemala to pursue their asylum claims. El Salvador and Honduras also reached agreements with the United States relating to migration. Mexico committed to increasing its efforts to stem the flow of unauthorized immigration through its borders and assented to the U.S. expansion of its Migrant Protection Protocols. The Trump administration has continued pursuing other tactics to limit immigration and the availability of asylum, including through the issuance of legal decisions by Attorney General William Barr and continued litigation surrounding the construction of a border wall.