The U.S. Postal Service defended its plan to replace the majority of its delivery vehicles with gas-powered trucks while electrifying some of its fleet. “Our commitment to an electric fleet remains ambitious given the pressing vehicle and safety needs of our aging fleet as well as our dire financial condition,” Postmaster General Louis DeJoy said in a statement on Sunday. “The proposed action, which we are evaluating under the National Environmental Policy Act (NEPA), includes an initial order plan for 5,000 electric vehicles, and the flexibility to increase the number of electric vehicles introduced should additional funding become available.” The...