Inside the Strangest Job on the Campaign Trail

"What about your gaffes?" Campaign trackers make sure candidates can't escape slipups.

A TV camera films a model of 'Moon Mask' by Ugo Rondinone as it is is unveiled as a proposed design for the Fourth Plinth at the Crypt, St Martin-in-the-Feilds on September 24, 2013 in London, England.
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