The U.S. Constitution itself does not explicitly mention illegal immigration. However, federal laws and Supreme Court interpretations establish the government's authority over immigration matters. The Constitution grants Congress the exclusive power to regulate immigration, including the admission and exclusion of aliens. This includes the authority to set conditions on entry, deport those unlawfully present, and enforce immigration laws. Aliens outside the U.S. have no constitutional right to enter, and those who enter unlawfully can be subject to penalties and removal. Federal statutes under Title 8 of the U.S. Code criminalize illegal entry and harboring of unauthorized immigrants, providing penalties including fines and imprisonment. The Supreme Court has ruled that the government can exclude aliens without hearings when outside U.S. borders. Inside the U.S., undocumented immigrants have some constitutional protections, but these are limited compared to citizens. Recent policies emphasize strict enforcement against unauthorized immigration to protect national security and public safety. The President and Congress implement and enforce these laws under the Constitution’s framework, aiming to address illegal immigration while balancing constitutional rights where applicable. In summary, the Constitution provides the federal government broad authority to regulate immigration and exclude or deport illegal immigrants, though it does not explicitly mention "illegal immigration" by that term. Federal laws and court rulings elaborate on this authority and its limits.