U.S. President Barack Obama is working on his speech to the Democratic Party at their convention in Philadelphia.
(He speaks Wednesday night at 10pm eastern / 0200 GMT)
He was one of many praising the job his wife Michelle Obama did in explaining why Hillary Clinton must be president.
White House deputy spokesman Eric Schultz previewed the themes of the president's speech.
IN: "I think...
OUT: ....public service."
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