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US President Barack Obama greets North Carolina Democratic Senator Kay Hagan upon arrival at Charlotte Douglas International Airport in Charlotte, North Carolina, August 26, 2014.
US President Barack Obama greets North Carolina Democratic Senator Kay Hagan upon arrival at Charlotte Douglas International Airport in Charlotte, North Carolina, August 26, 2014.

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    Obama's help in N.C. race too late?

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Obama's help in N.C. race too late?

Black voter turnout could be key in North Carolina. CNN's Rene Marsh reports.

Obama's help in N.C. race too late?

Black voter turnout could be key in North Carolina. CNN's Rene Marsh reports.