Richard McDuffie Richard McDuffie is chief operating officer of Dunavant, a Memphis-based global logistics company. The impact of tariffs By Richard McDuffie Published: November 30, 2018 1:59 PM CT The tariffs implemented by President Donald Trump’s administration are prompting supply-chain disruptions from coast to coast. Topics Donald Trump Dunavant Logistics tariffs Comment On This Story Please enable JavaScript to view the comments powered by Disqus.