First of all, anyone who honestly examines the incredible challenges confronting President Obama when he took office has to feel enormous empathy for him: the Great Recession, with the high unemployment and the enormous public and private indebtedness it produced; two seemingly interminable wars; an intractable political opposition whose true leaders — entertainers masquerading as pundits — openly declared that their objective was to ensure that the new president failed; a badly broken Senate that is almost completely paralyzed by the threat of filibuster and is controlled lock, stock and barrel by the oil and coal industries; a contingent of nominal supporters in Congress who are indentured servants of the same special interests that control most of the Republican Party; and a ferocious, well-financed and dishonest campaign poised to vilify anyone who dares offer leadership for the reduction of global-warming pollution.

In spite of these obstacles, President Obama included significant climate-friendly initiatives in the economic stimulus package he presented to Congress during his first month in office. With the skillful leadership of House Speaker Nancy Pelosi and committee chairmen Henry Waxman and Ed Markey, he helped secure passage of a cap-and-trade measure in the House a few months later. He implemented historic improvements in fuel-efficiency standards for automobiles, and instructed the Environmental Protection Agency to move forward on the regulation of global-warming pollution under the Clean Air Act. He appointed many excellent men and women to key positions, and they, in turn, have made hundreds of changes in environmental and energy policy that have helped move the country forward slightly on the climate issue. During his first six months, he clearly articulated the link between environmental security, economic security and national security — making the case that a national commitment to renewable energy could simultaneously reduce unemployment, dependence on foreign oil and vulnerability to the disruption of oil markets dominated by the Persian Gulf reserves. And more recently, as the issue of long-term debt has forced discussion of new revenue, he proposed the elimination of unnecessary and expensive subsidies for oil and gas.

All that might be completely understandable and make perfect sense in a world where the climate crisis wasn't "real." Those of us who support and admire President Obama understand how difficult the politics of this issue are in the context of the massive opposition to doing anything at all — or even to recognizing that there is a crisis. And assuming that the Republicans come to their senses and avoid nominating a clown, his re-election is likely to involve a hard-fought battle with high stakes for the country. All of his supporters understand that it would be self-defeating to weaken Obama and heighten the risk of another step backward. Even writing an article like this one carries risks; opponents of the president will excerpt the criticism and strip it of context.