You can add energy companies Linn Energy and Penn Virginia to the list as well, they just announced Chapter 11.
I think Obama read Sir Winston Churchill's strategic plan to defeat the Nazis:
1. Destroy manufacturing industry...starting with ball bearing factories
2. Destroy coal mining, oil production and means of distribution
3. Terrorize the population (bomb the Rhur dams and fire bomb Dresden)
What Obama has done / is doing follows those instructions.