Immigration law determines whether a person is an alien, the rights, duties, and obligations associated with being an alien in the United States, and how aliens gain residence or citizenship within the United States. It also provides the means by which certain aliens can become legally naturalized citizens with full rights of citizenship. Immigration law serves as a gatekeeper for the border of the nation, determining who may enter, how long they may stay, and when they must leave. Immigration lawyers represent persons seeking temporary and permanent residency (green cards) status in the U.S., those interested in obtaining U.S. citizenship through a process called naturalization, and clients facing deportation and removal. Immigration attorneys may also represent businesses seeking to secure temporary visa status for foreign employees.
Campbellton is an unincorporated community in Atascosa County, Texas, United States. According to the Handbook of Texas, the community had an estimated population of 350 in 2000. It is located at 28°44′51″N 98°18′09″W / 28.7475°N 98.3025°W / 28.7475; -98.3025 (28.7474820, -98.3025108), at the junction of U.S. Highway 281, FM 1099, and the Atascosa River in southeastern Atascosa County, approximately 12 miles east of Christine and 54 miles south of San Antonio. Campbellton is part of the San Antonio Metropolitan Statistical Area. Although it is unincorporated, Campbellton has a post office with the zip code of 78008.. Public education is provided by the Pleasanton Independent School District.