President Trump's order imposing new tariffs on scores of countries and the European Union starting in seven days has injected a new dose of uncertainty in an already uncertain process.

The countries facing the highest rates are Laos and Myanmar at 40% and Syria -- at 41%. The president previously announced a 40% tariff on Brazil, that when added on top of the 10% baseline tariff, means a 50% rate on the country's imports to the U.