LINCOLN — A voting advocacy group has sued to block Nebraska’s secretary of state from sharing voter registration data with the U.S. Department of Justice. Common Cause asked a Lancaster County District Court to find that the DOJ request violates Nebraska law protecting data privacy. It aims to prohibit the Secretary of State from providing the voter data to the DOJ or to limit the types of data shared. Critics have questioned the safety of letting any administration consolidate such voter data in one place. A public and more limited version of Nebraska’s voter file, including names and addresses, is available for a fee.