The rapidly expanding environmental catastrophe caused by the oil spill off the coast of Louisiana is presenting a growing political challenge to the Obama White House, with Mr. Obama and his aides at pains to defend the response and forestall comparisons to the Hurricane Katrina crisis. Failure to get control of the relief effort and contain the environmental challenge could pose the same kind of political threat to Mr. Obama's popular standing that the much-criticized handling of the aftermath of Hurricane Katrina did for former President George W. Bush. And unlike Katrina, it is likely the federal government will be the clear lead authority in dealing with the BP spill.
