[20190116]IF11074_美国针对抵达边境的外国人的移民法.pdf

https:/crsreports.congress.gov Updated January 16, 2019U.S. Immigration Laws for Aliens Arriving at the BorderIntroduction In recent years, the migrant population arriving at the U.S.-Mexico (Southern) border without legal immigration status has shifted from being comprised predominantly of Mexican adult economic migrants to being comprised primarily of Central American adults, family units (adults with at least one child under age 18), and unaccompanied children, many of whom seek asylum in the United States. How they are processed and what options they have for legal admission and residing lawfully in the United States depend on how they attempt to enter the United States, whether they are children and/or arrive in families, what country they originate from, and if they request asylum. Aliens (foreign nationals) who wish to enter the United States may request admission legally at a U.S. port of entry or may attempt to enter the United States illegally between ports of entry. The Department of Homeland Security (DHS) has broad discretion to detain aliens, including asylum seekers, during the pendency of removal proceedings that determine whether they are admissible or have other