Trump's new Mexico tariffs make no sense, says former US ambassador to Mexico

1:38 PM ET Fri, 31 May 2019

Jorge Guajardo, former Mexican ambassador to China and consul general to the U.S.; James Jones, Monarch Global Strategies chairman, and CNBC's Michelle Caruso-Cabrera join "The Exchange" to discuss President Trump's threat to impose tariffs on Mexico over border security issues.