Jack Gerard – the head of the American Petroleum Institute has threatened the President of the United States over the construction of the Keystone oil pipeline.

The pipeline obviously represents a huge commercial interest, and they are willing to fight for the money invovled.

This is an old story from 2005, but it is still relevant:
http://www.washingtonpost.com/wp-dyn/articles/A19162-2005Jan18.html. Climate change is attacked on political grounds when it becomes inconvenient for economies.