Full agreements have yet to be reached with the U.S.’s three largest trading partners, Canada, China and Mexico; some Canadian imports have been subject to a 35 percent tariff since early August.

President Donald Trump’s sweeping new tariffs on over 90 countries worldwide have now taken effect. According to the White House, goods from over 60 countries and the European Union faced tariff rates of 10% or higher just after midnight on Wednesday.

President Donald Trump’s trade war with the world came into force at midnight, with sweeping tariffs hitting scores of America’s commercial partners. But what happens next is profoundly unclear. The two critical questions: Are the tariffs working?