China's "Currency Devaluation Game"

Donald Trump was apparently angry about the value of the Russian ruble and the Chinese yuan against the dollar. He complained in a tweet that both are playing the "Currency Devaluation game" in a tweet yesterday.

Neil Irwin rightly points out that the complaint against Russia is bizarre, both because we don't have much trade with Russia, but also because the most obvious reason its currency is falling is sanctions pushed by the United States and other western countries. The story with China i...