Details of US president-elect Donald Trump's foreign, trade and energy policies are finally starting to materialise, a week before he takes office. Rex Tillerson, the former ExxonMobil chief executive nominated by Trump as secretary of state, seeks a return to US leadership on world security. His country's renewed leadership in energy production could underpin this ambition. But squaring foreign policy goals with Trump's trade policies may become Tillerson's biggest challenge.
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