Arizona's frustration with failures in the federal immigration system and issues along the Arizona-Mexico border led Governor Jan Brewer to sign SB 1070 in 2010, allowing police to check immigration status during traffic stops if they suspected someone was undocumented. While a judge blocked parts of the law from taking effect, such as requiring proof of status, some provisions remained. Arizona's actions inspired over two dozen other states to introduce similar bills, as frustration with the federal government grew and more states debated immigration policies.