A sign guides voters to a polling location as they line up to cast their votes Tuesday, Nov. 6, 2012, in Dallas. After a grinding presidential campaign, Americans head into polling places across the country. (AP Photo/Tony Gutierrez)

Associated Press
A sign guides voters to a polling location as they line up to cast their votes Tuesday, Nov. 6, 2012, in Dallas.   After a grinding presidential campaign, Americans head into polling places across the country. (AP Photo/Tony Gutierrez)
A sign guides voters to a polling location as they line up to cast their votes Tuesday, Nov. 6, 2012, in Dallas. After a grinding presidential campaign, Americans head into polling places across the country. (AP Photo/Tony Gutierrez)
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