'This is when you're the most vulnerable'
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Ex-Senator: This is when you're the most vulnerable

Barack Obama has held talks with his successor Donald Trump at the White House.

Ted Kaufman is a former Democratic senator who helped Obama's transition in 2008. He told the Today programme the transition period is when "you're most vulnerable from a national security concern", but Mr Trump will receive a "great transition".

  • 11 Nov 2016
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