I'm not sure I know how to link to this properly, but Sam Gilston of the Washington Tariff & Trade Letter was on C-Span's Washington Journal talking U.S. trade policy. He comes on at about 2:07:30 of the program, so you have to scroll forward a bit. (The link works for now, but by tomorrow, you may need to search C-Span to find the program, which aired on Jan 3. Or it might still work -- I'm not sure.)