Sydney Morning Herald | US elections 2016: Oil baron Harold Hamm endorses Donald Trump for president Sydney Morning Herald Houston: Harold Hamm, chief executive of shale oil producer Continental Resources and Mitt Romney's 2012 energy adviser, has endorsed US presidential candidate Donald Trump, saying he has the "fortitude to make tough decisions". Mr Hamm, who had ... US oil baron Harold Hamm endorses Trump for president Oil tycoon Harold Hamm backs Trump Billionaire oil tycoon Harold Hamm endorses Trump |