Retired D.E.A. agent and “Deal” author Mike Vigil spent roughly 20 years undercover in Mexico and Colombia. Vigil argues that GOP presidential frontrunner Donald Trump’s proposal to build a wall on the Mexican border will not stop drug cartels from sending drugs into the United States.
Produced by Eames Yates
Follow BI Video: On Twitter
NOW WATCH: Briefing videos
Business Insider Emails & Alerts
Site highlights each day to your inbox.