The U.S. Postal Service's next-generation delivery vehicle, left, is displayed as one new battery electric delivery trucks leaves the Kokomo Sorting and Delivery Center in Kokomo, Ind., Thursday, Aug. 29, 2024. (AP Photo/Michael Conroy)

U.S. Postal Service delivery driver Avis Stonum stands in the work lot of a postal facility on Thursday, Sept. 5, 2024, in Athens, Ga. (AP Photo/Ron Harris)

Mail delivery vehicles are seen at a post office on Thursday, Sept. 5, 2024, in Athens Ga. (AP Photo/Ron Harris)

U.S. Postal Service delivery driver Avis Stonum maneuvers one the the newest fleet vehicles through the work lot of a postal facility on Thursday, Sept. 5, 2024, in Athens, Ga. (AP Photo/Ron Harris)

The U.S. Postal Service's next-generation delivery vehicle is displayed at the Kokomo Sorting and Delivery Center in Kokomo, Ind., Thursday, Aug. 29, 2024. (AP Photo/Michael Conroy)

U.S. Postal Service delivery driver Richard Burton stands in the work lot of a postal facility on Thursday, Sept. 5, 2024, in Athens, Ga. (AP Photo/Ron Harris)

New mail delivery vehicles are charging at a station at a post office on Thursday, Sept. 5, 2024, in Athens Ga. (AP Photo/Ron Harris)

Patrick Ecker, executive manager of fleet services for the U.S. Postal Service, stands in front of a new mail delivery truck on Thursday, Sept. 5, 2024, in Athens, Ga. (AP Photo/Ron Harris)