Donald Trump announced a major shift in U.S. automotive policy by authorizing the production of Japanese kei vehicles in the United States despite previous bans due to safety concerns.He instructed Transportation Secretary Sean Duffy to work with the National Highway Traffic Safety Administration to ensure safety compliance for these tiny cars, which are popular in Japan but do not meet current federal U.S. standards.This policy shift aligns with efforts to relax Biden-era fuel-efficiency rules and aims to promote smaller, cheaper, and more fuel-efficient vehicles, although safety and regulatory issues remain debated.