Amid rural Louisiana’s crawfish farms, towering pine trees and cafes serving po’boys, nearly 7,000 people are waiting at immigration detention centers to learn whether they will be expelled from the United States.

If President Donald Trump’s administration has its way, the capacity to hold tens of thousands more migrants will soon be added around the country as the U.S. seeks an explosive expansion of what is already the world’s largest immigration detention system.

Trump’s effort to conduct mass deportations as promised in the 2024 campaign represents a potential bonanza for private prison companies and a challenge to the government agencies responsible for the orderly expulsion of immigrants. Some critics say the administration’s plans also include a deliberate attempt to isolate detainees by locking them up and holding court proceedings far from their attorneys and support systems.