Can Kamala Harris win on "vibes" alone?

<p>There is new and significant polling from the swing states which is energising the Democratic campaign. But beyond the headline numbers, what do the polls tell us about how long Kamala Harris’s boost in popularity might last? </p><p>This week Justin and Sarah look at what voters in swing states think about both candidates, and how they decide to who to vote for.</p><p>Ruth Igielnik, Polling Editor for the New York Times, gives us a behind the scenes insight into the accuracy of polls.</p><p>HOSTS: • Justin Webb, Radio 4 presenter • Sarah Smith, North America Editor...