Your guide to the US election vote count

Donald Trump and Kamala Harris have made their final pitches to the American people and voting is finally underway in the United States after a tumultuous campaign.  So, when the polls close, how long will it take for the votes to be counted and a winner to be declared?  Today, the ABC’s US election analyst Casey Briggs explains how it could unfold, when to pay attention and what to watch out for.  Featured:  Casey Briggs, ABC US election analyst