WASHINGTON (AP) — Democrats on the House Oversight Committee are seeking an investigation into a U.S. Postal Service plan to replace its aging mail trucks with mostly gasoline-powered vehicles. The plan largely ignores White House calls to replenish the mail-service fleet with electric vehicles and has drawn sharp criticism from the Biden administration, Democratic lawmakers and environmentalists, who say it falls far short of President Joe Biden’s goals to address climate change. In a letter Monday, Democrats on the oversight panel asked the agency’s inspector general to investigate whether the Postal Service complied with the National Environmental Policy Act and...