If you want to see where President Barack Obama’s response to the Deepwater Horizon disaster is heading, try following the urgings of the Center for American Progress. The liberal think tank with close White House ties appears to have more influence on spill policy than the president’s in-house advisers. On May 4, for instance, the CAP’s energy and environment expert, Daniel Weiss, called on the president to name an independent commission to look at the causes of the Deepwater Horizon disaster. On May 22, he did just that. On May 21, CAP president, John Podesta, privately implored White House officials...