Trump's 1st trade deal should be with Japan

To be clear, any bilateral deal would be far inferior to the Trans-Pacific Partnership, which would have not only lowered barriers to trade but also raised labor and environmental standards, forced domestic economic reforms and encouraged new supply chains linking the U.S. to the world's fastest-growing region.

But given that the U.S. and Japan are two of the world's three biggest economies -- their combined GDP accounts for more than 75 percent of the total among TPP nations -- and their combined trade in goods and services is close to $200 billion a year, a deal between them could at least calm fears that the world is lurching toward protectionism.

What's more, Japan is a resolute U.S. ally and champion for the liberal order that has underwritten American prosperity for decades. Japan maintains good relations -- and influence -- with countries across the region, including the Philippines and others whose affection for the U.S. can fluctuate.

These governments want investment, expertise and equipment from Japan at least as much as they want it from China. If the U.S. under Trump steps back from engagement with Asia, then Japan, along with India and Australia, will need to be counted on to defend an open, rules-based order.

The TPP was set to strengthen the Japanese economy. Prime Minister Shinzo Abe made several painful concessions, in part because he hoped the deal would help him crack open some of Japan's most ossified sectors, including agriculture.

Such reforms are critical to reviving economic growth -- and thus ensuring that Japan has the resources to help provide security in Asia.

Because much of the hard bargaining with Abe's government has been done for the TPP, sorting out the details of a new deal should be relatively straightforward. Certain aspects of the pact -- those dealing with state-owned enterprises, for instance, or labor and environmental standards that both countries already meet -- could be cut or simplified.

If the original deal is largely preserved in bilateral form, it would confer many of the TPP's benefits for both sides, while keeping open the possibility of reviving a full TPP at a later date. The other signatories could still move ahead without the U.S. even now.