America's Very Polite Debate

US vice-presidential debates don't usually get much attention. But with both Donald Trump and Joe Biden well into their 70s, plenty of voters are asking: what if? Today on The Signal, Mike Pence and Kamala Harris have faced off in the only vice-presidential debate of the election. So what impact will it have on the contest? And despite Joe Biden's persistent polling lead, could Donald Trump still win? Featured: Sean Trende, Senior Elections Analyst, RealClearPolitics and Visiting Fellow, American Enterprise Institute