Fifty years ago today, President Lyndon Johnson signed the Voting Rights Act, which many consider the most important civil rights legislation of the 1960s. The law gave the federal government oversight responsibility over elections in all or part of 15 states (including parts of New York, Michigan, and California) where there had been systemic exclusion of voters based on race, ethnicity, or economic status. Under the Voting Rights Act, states had to pre-clear any changes to voter eligibility rules or election conduct prior to implementing these changes.