Donald Trump is considering tapping North Dakota's Doug Burgum to be his new "energy tsar", giving the oil state's governor sweeping power to slash environmental regulations and boost US fossil fuels output. Burgum, a billionaire businessman who ran in the Republican primary race this year before endorsing Trump, is the president-elect's preferred candidate for the role, said people familiar with the discussions. Former energy secretary Dan Brouillette is also a contender. Trump is weighing the reappointment of officials from his first term to senior energy roles as he looks to battle-hardened veterans to overhaul rules...