Arizona’s new law hasn’t even gone into effect yet, and it’s already having the desired effect:

Hundreds, perhaps thousands, of undocumented workers have been fired as a result of Arizona businesses reviewing the work-eligibility forms of their employees as the state’s new employer-sanctions law draws near. … Eligio Medina Roldan, 44, is one of those workers who lost his job. … “I don’t have papers that show I can work legally, so I won’t be able to work,” he said. “And I can’t work, then I’ve lost the reason for being here. My only option is to go back” to Mexico.