These machines are vital because they do the majority of mail sorting for the entire USPS. They process most of the envelope mail, which includes election ballots heading to voters.

This summer the American Postal Workers Union filed a grievance against the U.S. Postal Service over the agency’s plans to decommission 671 mail-sorting machines at facilities across the country.

Some of these machines have the capacity to sort up to 30,000 mail items and take only two Postal Service workers to run, according two machine technicians CNN spoke with.

At least six sorting machines at the Portland facility alone have already been taken offline in the past month, according to Joe Cogan, the head of Portland's postal union. Their fate remains unclear.

Mail-sorting machines process paper mail at distribution centers, speeding delivery and distribution. Each mail-sorting machine can sort 36,000 pieces of paper mail per hour.

Some of these machines have the capacity to sort up to 30,000 mail items and take only two Postal Service workers to run, according two machine technicians CNN spoke with.

The White House says USPS isn’t removing mail-sorting machines. Postal workers say it is. Mark Meadows denied reports that hundreds of mail-sorting machines are being taken offline as part of a ...

White House Chief of Staff Mark Meadows on Sunday said the US Postal Service will not scuttle any mail-sorting machines between now and the election — and called on Democrats to make Presiden… ...

Of the 671 retired mail-sorting machines that The Washington Post reported were removed from 49 states, the District of Columbia and Puerto Rico in recent weeks, 59 were from Florida, 58 in Texas ...

Two of the 10 mail sorting machines at the U.S. Postal Service’s Southern Maine Processing and Distribution Center in Scarborough were removed prior to Postmaster General Louis DeJoy’s ...

Photos obtained by CNN are beginning to show where some of the 671 mail sorting machines the United States Postal Service has planned to remove have ended up.