It was a Transocean rig that BP had leased. The US govt has remained very quiet about that, e.g. Transocean will be paying a dividend to its shareholders this year and not a whisper of criticism about that from Obama.
Heck, even the irredeemably eeeevil Haliburton which did the (apparently) failed cementing is getting off easy, so far.
In all fairness, I've read detailed accounts about how BP specified an inadequate cementing, but since when have inconvenient facts like that mattered in D.C.?
Puzzling in a way, though right? I mean this administration didn't hesitate to give AIG and Goldman Sachs very public tongue lashings. What's different about an oil rig company that screwed up?