The Koch family owns the largest private oil company in the US. In 2016, they spent $889 million - more than republicans and democrats combined - to purchase the US Congress.
https://www.nytimes.com/2015/01/27/us/politics/kochs-plan-to...
The current US Energy Secretary is an oil CEO who gave money to Trump.
https://www.pbs.org/newshour/politics/trump-names-chris-wrig...