WASHINGTON (AP) — President Donald Trump on Wednesday accused China and Europe of playing a "big currency manipulation game." He said the United States should match that effort, a move that directly contradicts official U.S. policy not to manipulate the dollar's value to gain trade advantages.

In a tweet, the president said if America doesn't act, the country will continue "being the dummies who sit back and politely watch as other countries continue to play their games — as they have for so many years."

Trump's own Treasury Department in May found that no country meets the criteria of being l...