[https://www.nationthailand.com/business/30394595?utm_source=homepage&utm_medium=internal_referral](https://www.nationthailand.com/business/30394595?utm_source=homepage&utm_medium=internal_referral) President Donald Trump's "America First" policy drew strong pushback on two fronts Tuesday, as the World Trade Organization sided with China in a legal challenge to U.S. tariffs and Canadian threats of retaliation led the United States to abandon plans for a fresh set of import taxes.