AIC Director Dan Sumner appeared to discuss agricultural trade on a July 9, 2018, segment of UpFront, a public affairs program on 94.1 KPFA (Berkeley Public Radio). The interview is available at:

Sumner segment: streaming audio (mp3)

The Sumner segment is preceded by an interview about trade tariffs with UC
Berkeley economic historian Barry Eichengreen. A streaming recording of the whole episode is also available at:

KPFA July 9, 2018 episode page