The World Trade Organization is unable to deal with the core challenges of the global trading system, but the U.S. is not ready to leave the body, U.S. Trade Representative Jamieson Greer said on Tuesday. Greer, in a live interview on Bloomberg television, was asked whether Washington planned to quit the WTO after trade ministers meeting in Cameroon failed to agree on an extension of a moratorium on e-commerce duties and move forward with some basic reform steps. "Well, I wouldn't say that," Greer responded. "I would just say that the ability of the World Trade Organization to meet the needs of the moment - addressing structural imbalances, currency issues, huge export-driven surplus by other countries - the WTO has never been able to address those things, and it won't be going forward. It can barely address issues on its current agenda."