ATHENS, Ga. (AP) — The Postal Service’s new delivery vehicles aren’t going to win a beauty contest. They’re tall and ungainly. The windshields are vast. Their hoods resemble a duck bill.

A little-noticed part of Trump’s tax and immigration package would see the U.S. undo billions of dollars in electric vehicle investments by the Postal Service.

The new trucks are being built with comfort, safety and utility in mind, by Oshkosh Defense in South Carolina. Even tall postal carriers can stand up without bonking their heads and walk from ...