Both the Trump and Biden campaigns were on the trail in Arizona on Thursday. Vice President Mike Pence, Joe Biden and Senator Kamala Harris courted voters one day after the first and only vice presidential debate between Pence and Harris. Our CBS News Battleground Tracker poll shows Biden with a five point edge in the state, which typically votes Republican. CBS News political correspondent Ed O'Keefe joins CBSN's Lana Zak to discuss that and more.