Did Trump start a trade war with Mexico, Canada and China?

President Trump imposed tariffs on Mexico, Canada and China and retaliatory tariffs from those countries are now possible. Paul R. La Monica, a senior markets analysis writer for Barron's, joins CBS News with more on the trade war.

Did Trump start a trade war with Mexico, Canada and China?
President Trump imposed tariffs on Mexico, Canada and China and retaliatory tariffs from those countries are now possible. Paul R. La Monica, a senior markets analysis writer for Barron's, joins CBS News with more on the trade war.