"We have to make sure that during this transition period that there is a seamless passing of the baton," Obama said in remarks before a closed-door meeting with his Joint Chiefs of Staff and regional combatant commanders.
Obama will leave the White House on January 20, when Donald Trump is sworn in as the 45th president of the United States.
Trump's mercurial personality and meteoric rise to become the world's most powerful man has led to a slew of questions about how he will wield that power.
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