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Obama will speak today to young community leaders and organizers at the University of Chicago, where his presidential library is planned.
The phone call, which took place Monday morning Beijing time, came amid speculation that Pyongyang could hold a sixth nuclear test this week.
The authors describe how the campaign ignored the advice of President Bill Clinton to reach out to communities that weren't already on board with her policies.
Whitson broke the record for the most cumulative time in space by an American astronaut, streaking past the 534-day record held by Jeff Williams.