Vice President Joe Biden puts on a United Steelworkers hat before he spoke to a crowd before he joined in the annual Labor Day parade on Monday, Sept. 7, 2015, in Pittsburgh. (AP Photo/Keith Srakocic)
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Vice President Joe Biden puts on a United Steelworkers hat before he spoke to a crowd before he joined in the annual Labor Day parade on Monday, Sept. 7, 2015, in Pittsburgh. (AP Photo/Keith Srakocic)
