This article was originally published by Votebeat , a nonprofit news organization covering local election administration and voting access.

The U.S. Justice Department has sent letters to election officials in at least two key swing states, threatening action against the states if they don’t comply with provisions of a 2002 federal election law.

Lawyers from the department’s civil rights division sent letters in recent weeks to both Arizona and Wisconsin. The Arizona letter said that state officials are not properly verifying voters’ identities as dictated by the Help America Vote Act, and warned of a lawsuit. The Wisconsin letter said the Wisconsin Elections Commission is not properly resolving administrative complaints as required by the same law, and threatened to withhold fed

See Full Page