VP running mates cheer top of their tickets from the trail
Clip: 10/19/2016 | 4m 22s
Hillary Clinton and Donald Trump will debate for the last time in Las Vegas, where both campaigns have invited guests who may rattle the opposition. The final face-off comes as Donald Trump faces sliding poll numbers and allegations of sexual assaults, while pressing claims of a rigged election. John Yang reports on how their running mates are boosting Trump and Clinton from the campaign trail.
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