On the latest episode of Rising Tide, hosts David Helvarg and Vicki Nichols-Goldstein sit down with Angelo Villagomez, Senior Ocean Fellow at the Center for American Progress in Washington D.C. — a man who has spent his career turning conviction into policy at the edges of the map.

A longtime activist and advocate for community and indigenous governance, Villagomez was a central force behind the establishment of the Mariana Trench National Marine Monument, doing the hard, unglamorous work of coalition-building from the ground up while based in Saipan, deep in the western Pacific.

The conversation turns, as it must, to the present dangers. The Trump administration has set its sights on the nation's marine monuments, thrown open the door to deep-sea mining with reckless enthusiasm, and pursued what can only be described as a vendetta ag ...