The U.S. Postal Service is considering closing post offices across the country, sparking concerns ahead of an anticipated surge of mail-in ballots in the 2020 elections, U.S. Sen Joe Manchin and a union leader said Wednesday.

Manchin said he has received numerous reports from post offices and colleagues about service cuts or looming closures in West Virginia and elsewhere, prompting him to send a letter to Postmaster General Louis DeJoy asking for an explanation.

The possible cutbacks come as DeJoy, a major donor to President Donald Trump who took control of the agency last month, moves to eliminate overtime for hundreds of thousands of postal workers, potentially causing a delay in mail deliveries. A recent document from the Postal Service, obtained by The Associated Press, described the need for an “operational pivot” to make the cash-strapped agency financially stable.

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