The oil and gas sector companies are among one of the groups that are the biggest spenders on lobbying , especially with the recent Deepwater Horizon oil spill putting restrictions on their ability to do offshore drilling . During the 2008 elections , oil companies spent a total of $ 132.2 million into lobbying for law reform . The three biggest spenders from the oil and gas sector group are Koch Industries ( $ 1,931,562 ) , Exxon Mobil Corporation ( $ 1,337,058 ) and Chief Oil & Gas ( $ 1,192,361 )
Deepwater Horizon oil spill
Deepwater Horizon oil spill
Direct lobbying in the United States