The European Union plans to retaliate against the United States for new steel and aluminum tariffs, adding another element to rising global trade tensions. "Unjustified tariffs on the EU will not go unanswered—they will trigger firm and proportionate countermeasures,

President Donald Trump signed an order Monday imposing global tariffs of 25% on all steel and aluminum imports, likely pleasing domestic steelmakers but hurting allies like Canada and Mexico.

President Donald Trump just made his trade war global and the rest of the world are scrambling to respond. Some wasted little time reacting on Tuesday. The European Union hit back at the U.S. over tariffs,