Inside the AP's process for calling election races

“Inside the AP's process for calling election races”

Millions of votes have been cast in this midterm election. Traditional battlegrounds have expanded in the fight to control Congress. It all comes down to one question: who won? This year, PBS News is again relying on the Associated Press to call winners in critical races. For a closer look at how the AP makes those race calls, Deema Zein spoke with David Scott of the Associated Press.