According to a pair of advocacy organizations for free and fair elections, Tuesday’s U.S. Senate GOP runoff in Mississippi might not meet that ideal.

The American Civil Rights Union has sent warning letters to five Mississippi counties — Clarke, Humphreys, LeFlore, Madison and Noxubee — to purge their voter rolls of ineligible voters or face federal court action. The ACRU found, using state voter data and the most current U.S. Census numbers, that all five had more registered voters than voting-age eligible residents. This is a violation of both state and federal law.

The counties have 90 days to comply with the order.

Christian Adams, the ACRU attorney who is monitoring Tuesday’s election results, said the findings are a serious threat to free and fair elections in the state.

“When you’ve got more people than you’ve got people alive, there’s a problem with the rolls and they need to get them cleaned up,” Adams said. “Unfortunately, year after year, there’s a failure to keep the rolls maintained correctly. Federal law and frankly, Mississippi law, requires they purge their rolls. It’s not an option.”

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