I don't know if I can say “major.” The larger issue, more so than the U.S., is the incorporation of China. That's longer. The logjam with the U.S. can be broken. China requires structural change, fundamental change and rethinking.
Again, the WTO continues to work. You've had countries that have taken initial decisions and agreed to abide by them without going through. Don't think that it's completely hopeless and gone. Your question as to a major role, or will it just have this...whenever countries happen to decide they'll take the first ruling? I don't know. The larger question is China and how we accommodate the Chinese model in the global trading system.