US trade representative Jamieson Greer expresses dissatisfaction with WTO negotiations.
Washington plans to work outside the WTO framework to address ecommerce tariffs.
The failure of talks raises concerns about future trade relations.
Briefing: US Trade Representative Slams WTO After Ecommerce Tariff Talks Fail
Strategic angle: Jamieson Greer criticizes the WTO, stating that the US will pursue alternative routes to extend the freeze on ecommerce tariffs.