The U.S. Department of Agriculture has asked California to share information about people who use CalFresh as part of a nationwide effort to stop fraud. CalFresh helps low-income residents buy groceries with monthly food stamps. California and other Democratic states have challenged the federal government's efforts in court. The California Department of Social Services says it is reviewing the USDA's new subpoena. California is the top state for SNAP spending, helping about five and a half million residents and spending over 12-and-a-half-billion dollars last year. Michigan, Illinois, and New York also received subpoenas.