Mexican guest workers gain Walmart, federal response, Louisiana, USA, 2012
The United States has a visa program called the H-2B visa. It allows employers to hire foreigners and let them come temporarily to work in the United States, usually for a one-time or peak load basis. This program has repeatedly been criticized for allowing employers to take advantage of guest workers, and in response, the U.S. Congress passed the Protect Our Workers from Exploitation and Retaliation (POWER) Act in June of 2011.