The decision to slap 220 percent tariffs on imported aircraft is so wrongheaded, so unjust, so self-defeating that it is hard to know where criticism should begin.

With this one ruling, the Trump administration has weakened the aviation industry, insulted two close U.S. allies and hurt American consumers. And all for the sake of what? Boeing, which initiated the action, wasn’t even bidding for the order to which it now objects.