US Agriculture Secretary Sonny Perdue (L) and his Mexican counterpart Jose Calzada pose for pictures after offering a joint press conference in Merida, Yucatan State, Mexico, on July 28, 2017.
Perdue and Calzada met for talks on agricultural trade issues ahead of the renegotiation of the North American Free Trade Agreement.  / AFP PHOTO / HUGO BORGES        (Photo credit should read HUGO BORGES/AFP/Getty Images)