“Obama’s Katrina”: that was the line from some pundits and news sources, as they tried to blame the current administration for the gulf oil spill. It was nonsense, of course. An Associated Press review of the Obama administration’s actions and statements as the disaster unfolded found “little resemblance” to the shambolic response to Katrina — and there has been nothing like those awful days when everyone in the world except the Bush inner circle seemed aware of the human catastrophe in New Orleans.

Yet there is a common thread running through Katrina and the gulf spill — namely, the collapse in government competence and effectiveness that took place during the Bush years.

The full story of the Deepwater Horizon blowout is still emerging. But it’s already obvious both that BP failed to take adequate precautions, and that federal regulators made no effort to ensure that such precautions were taken.

For years, the Minerals Management Service, the arm of the Interior Department that oversees drilling in the gulf, minimized the environmental risks of drilling. It failed to require a backup shutdown system that is standard in much of the rest of the world, even though its own staff declared such a system necessary. It exempted many offshore drillers from the requirement that they file plans to deal with major oil spills. And it specifically allowed BP to drill Deepwater Horizon without a detailed environmental analysis.