Trump’s 2018 metals tariffs created job growth in the steel industry, but ultimately cost consumers more money as a result of job losses in industries that rely on steel and aluminum, studies have shown.

The move came after Ontario backed off imposing a surtax on U.S.-bound electricity, capping a rollercoaster day on Wall Street.

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