Hmm… maybe. I’m not sure if “key partner” is actually as special as it sounds, or if it’s just puffery. It could be that a bunch of countries are “key partners” and it just happened to get mentioned in Panama’s report because the writer couldn’t think of something more specific to say. It would be more persuasive if we had the whole list of “key partners” and could show that the US is targeting all of them preferentially compared to countries with less cooperative status.