In this March 1, 2012 file photo, President Obama waves to the crowd as he walks through a snowstorm after getting off Air Force One in Manchester, N.H. (AP Photo/Winslow Townson, File)

Associated Press
In this March 1, 2012 file photo, President Obama waves to the crowd as he walks through a snowstorm after getting off Air Force One in Manchester, N.H. (AP Photo/Winslow Townson, File)
In this March 1, 2012 file photo, President Obama waves to the crowd as he walks through a snowstorm after getting off Air Force One in Manchester, N.H. (AP Photo/Winslow Townson, File)
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