President Donald Trump's tariffs on steel and aluminum imports has triggered sharp criticism from the international community, begging the question of how the world will react.
It's still too early to tell how other governments may respond — so far, Canada and the European Union have promised strong countermeasures but didn't provide details.
If the administration applies its tariffs to all steel and aluminum exports — as opposed to cherry-picking countries to punish — there are five nations that will suffer the most. Brazil, Canada and South Korea were the three largest suppliers of steel to the U.S. last year, according to data from IHS. Canada, Russia and the U.A.E. were the three largest suppliers of aluminum in 2016.
Cornell University Professor Eswar Prasad told CNBC that countries may hit back in the form of "surgical strikes," meaning they may choose to target specific U.S. products.