The president typically ties his tariffs to trade policy, but he hit Brazilian products with the highest rate of any country's goods largely due to politics.

The latest round of tariffs will reduce GDP in most countries. As the effects flow through, the global economy may be in for a rocky ride.

President Trump’s tariff onslaught left a lot of losers, from small, poor countries such as Laos and Algeria to wealthy U.S. trading partners such as Canada and Switzerland. But there were no real winners -- including the U.