Stephen Roach: The president has lost his credibility in trade war

Stephen Roach, former chairman of Morgan Stanley Asia, joins "Squawk Alley" via phone to discuss the current trade talks between the U.S. and China.

Stephen S. Roach, former Chairman of Morgan Stanley Asia and the firm's chief economist, is a senior fellow at Yale University's Jackson Institute of Global Affairs and a senior lecturer at Yale's School of Management. He the author, most recently, of Unbalanced: The Codependency of America and China and Stephen Roach on the Next Asia: Opportunities and Challenges for a New Globalization.