Coronavirus a test of Trump's ability to manage crisis: Brookings' Wessel

David Wessel, Brookings Institution; Brian Belski, BMO Capital Markets; and CNBC's Rick Santelli, join 'The Exchange' to discuss the state of the markets amid the sell-off.

cnbc,business,news,finance,investing,the exchange,stocks,economy,politics,breaking news,money,Wall Street,kelly evans,newsroom,