An anonymous federal whistleblower has warned that the Trump administration’s new system for handling mail ballots through the U.S. Postal Service is untested, fatally flawed and likely to lead to a “catastrophic failure” if it’s implemented ahead of November’s midterm elections. This follows President Trump’s executive order in March directing his administration to create federal lists of citizens and to refuse delivery of mail-in ballots to people not on those lists. The legality of Trump’s executive order is being challenged. The new hurdles raised by the executive order for mail ballots and the rushed software system built to administer them “create this potential for grave, catastrophic failure,” says David Kligerman from Whistleblower Aid, the organization representing the whistleblower.

With the midterm elections two months away, a federal whistleblower has warned that the U.S. Postal Service’s new mail voting system is untested, fatally flawed and likely to lead to a “catastrophic failure” if it’s implemented ahead of November’s midterm elections. Critics warn the system could disenfranchise millions of voters.

In March, President Trump signed an executive order directing his administration to create federal lists of citizens and directing the Postal Service to refuse delivery of mail-in ballots to people not on those lists. Voting rights groups and state officials have sued to block the new rules.