Yahoo Finance will chronicle the latest news and updates on Trump's tariffs — from the threats to the eventual policy.

On Saturday, President Donald Trump made good on his promise to impose steep tariffs on America’s three largest trading partners — Canada, China and Mexico — citing a national emergency on the flow of fentanyl and undocumented immigrants into the United States. Family suing Malibu rehab facility.

The tariffs if sustained could cause inflation to significantly worsen, possibly eroding voters' trust that Trump could as promised lower the prices of groceries, gasoline, housing, autos and other goods.