CHAMPAIGN, Ill. — On June 10, dozens of masked federal agents filed into the Glenn Valley Foods meatpacking plant in South Omaha, presenting a warrant to company officials to conduct an immigration raid. As agents entered the production floor, stunned workers in hard hats and hair nets were told in Spanish to raise their hands.
“Manos arriba!”
The next day, production at the chicken and steak plant dropped 80%, according to company officials…