Are we insane?

We cannot afford to repeat our past mistakes. Kerry must explain how his approach to climate work has changed.

Photo by Spencer Platt/Getty Images.

On April 22, 2016, then-Secretary of State John Kerry signed the Paris climate agreement on behalf of the United States with his two-year-old granddaughter Isabelle Dobbs-Higginson in his lap. The ceremony, held on Earth Day at the United Nations, marked “the first time the world's most prolific polluters, including …