The government of Vietnam has launched a WTO complaint about U.S. import rules for catfish, stating it has been “unfairly targeted”. The timing is curious given the last update to the rules was last year, though there are no other trade talks ongoing despite a meeting between President Quang and President Trump in mid-February. Vietnam accounted for 95% of America’s $382 million of catfish product imports in 2017. However, they have been in decline more recently with a 41% drop in the three months to January 31. With average import values per ton – a proxy for price – having risen 30% in...