Last Friday President Trump started an 11-day tour of Asia, the longest visit to the region since President George H.W. Bush was there in 1992. The five countries on the itinerary are Korea, Japan, Vietnam, the Philippines and, the headliner engagement, China. The trip is very heavy on security issues, namely dealing with North Korea’s nuclear proliferation. However, trade is also high on the agenda. Notably, like the situation with Mexico, Trump is focused on automobiles coming from Japan, mentioning that “many millions of cars are sold by Japan into the United States, whereas virtually no cars go from the United States into Japan.” Japan has a $69 billion trade surplus with the U.S., and it is driven by automotive export...