Harmeet Dhillon says states have “homework to do” on voter rolls as the DOJ warns election officials of potential criminal liability.

The head of the DOJ's civil rights division is warning state election officials of "potential criminal penalties" for those who fail to keep noncitizens from voting.

The U.S. Department of Justice has sent formal letters to election officials in all 50 states and Washington, D.C., giving them five days to explain how they comply with federal…