Hmm, it might have to do with the trade dispute between Argentina and the US (also EU, Japan and Mexico have filed suits against Argentina).
Argentine claims that the US is being unfairly "protectionist" against Argentina. That is what they told the WTO.
Now, I am sure that Argentina was bluffing when they raised this suit because everyone in the world knows that Argentina is ACTUALLY being protectionist.
Anyway the US and Argentina had 60 days (from August 30th) to sort this out amongst themselves before the WTO takes it up. The US, EU, Japan and Mexico don't seem to be backing off and that might have gotten Moreno's little panties in a twist because it won't be hard to prove the protectionist practices of Argentina that are against the regulations set out by the WTO.
Does that make any sense? It would get Moreno under fire pretty quickly.