Most international leftist & others don't understand the power of ICE Enforcement granted by Congressional Laws passed decades ago. "After ICE arrests and processes individuals for administrative immigration violations or CBP and other state, local and federal law enforcement partners turn them over to ICE, officials may detain them while their immigration cases are pending or release them under a form of supervision". https://www.ice.gov/statistics#:~:text=ERO%20uses%20targeted%2C%20intelligence%2Ddriven%20operations%20to%20prioritize,prosecutions%20for%20criminal%20activity%2C%20including%20immigration%2Drelated%20crimes.
