CNNMoney | America's biggest oil boom came under Obama CNNMoney Harold Hamm, a shale oil billionaire, gave a speech on Wednesday night at the GOP Convention arguing that Trump will become the first president to achieve American energy independence. "President Obama chose not to get it, and he has tried to destroy ... Oil Tycoon Hamm Says No Talks With Trump About Becoming Energy Secretary Trump Favoring Oil and Gas Mogul Harold Hamm for Energy Secretary, Sources Say Meet the Oil Billionaire Shaping Donald Trump's Energy Policy |