Trump's tariffs on Canada, Mexico and China suggest he is willing to risk a global trade war. The main thing that could stop him would be a stock market selloff.

Business groups, economists and even some Republicans cautioned that new tariffs on goods from Canada, Mexico and China could undercut U.S. industry and the economy.

President Trump’s tariffs on Canada, China and Mexico could upend U.S. trade. These nine charts show what’s at stake, what comes next and why it matters.