U.S. President Donald Trump threw a curve ball at China by linking the fentanyl issue to his tariffs on imports. The Chinese government is swinging back.

The Trump administration on Wednesday will effectively plaster 25% taxes – tariffs – on all steel and aluminum imports. The president said on Tuesday that the U.S. would double the forthcoming levy on the two metals to 50% if they come from Canada — but pulled back on the threat by the afternoon after the province of Ontario suspended its plans for retaliatory tariffs.