Al Gore may not have won the presidency (thank God), but over the last two years, he’s been given an enormous consolation prize by his friends on the left. He’s been designated as the Savior of the Planet. First came the warm wave of supportive publicity surrounding his slide-show documentary “An Inconvenient Truth.” Katie Couric and Harry Smith and Oprah Winfrey all touted Gore as so warm, so vulnerable and self-effacing, and his predictions so impossibly scary. Last May, Gore and Couric sat together on a sunny day in Central Park and unspooled the doom. Manhattan would be under deep...