Republican U.S. presidential nominee Donald Trump arrives at a campaign rally in Ambridge, Pennsylvania, October 10, 2016. He waves "The Terrible Towel," the rally towel of the Pittsburgh Steelers.

Republican US presidential nominee Donald Trump arrives at a campaign rally in Ambridge, Pennsylvania, October 10, 2016. He waves "The Terrible Towel," the rally towel of the Pittsburgh Steelers. 

Credit:

Mike Segar/Reuters

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