John Key stated it as plainly as he dared in New York yesterday: failure to ratify the Trans-Pacific Partnership agreement would be a "massive lost opportunity" for the United States, he said, "because in the end is that vacuum isn't filled by the United States, it will be filled by somebody else".
He could have gone further and suggested the "somebody else" could be China. Talks involving China, India, Japan, South Korea, the Asean members and Australia and New Zealand are under way on a project called the Regional Comprehensive Economic Partnership.
It envisages, as the title suggests, much more than a trade agreement. An "economic partnership" is a code of practice for business of all kinds that crosses national boundaries and brings international living standards to countries that subscribe to fair rules of competition and secure property rights.
The TPP has written the world's first agreed charter of that scale. It has been agreed between 12 governments of the Asia Pacific and awaits ratification by their legislatures. If it fails to pass a vote in the US Congress, most of those 12 countries will transfer their energies to the RCEP.
Key had no need to spell out the implications to his New York audience, the Council for Foreign Relations, but his real targets are in Washington. Some of them - but not all - are seeking re-election for Senate and House seats. Some will be defeated at the elections on November 8, but all of them retain their seats until the next Congress is sworn in late in January. That "lame duck" period is a chance for legislators to do what is right, though it may not be popular.