The US will find it "very difficult" to defend President's Donald Trump's proposed car tariff against any challenge at the World Trade Organization (WTO), a veteran trade adjudicator who has ruled on a related case told Reuters. Trump said this month that some imported vehicles and parts pose a "national security" threat, justifying tariffs under Section 232 of the Trade Expansion Act of 1962, the basis for tariffs put on steel and aluminium last year.
