Election officials "could be subject to criminal liability," Harmeet Dhillon said.

The Department of Justice threatened to take legal action over supposed noncitizen voters.

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.

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