The timing and scope of the U.S. action will depend heavily on how China responds to pressure for tougher steps against North Korea when U.S. and Chinese officials meet for a high-level economic dialogue in Washington on Wednesday, the administration sources told Reuters. President Donald Trump and his top aides have signaled growing impatience with China over North Korea, especially since Pyongyang last week test-launched its first intercontinental ballistic missile, which experts say could put all of Alaska in range for the first time.
