The two presidents are rallying in Pennsylvania ahead of the midterms. ABC News congressional correspondent Rachel Scott breaks down why the Keystone State is key to both Democrats and Republicans. WATCH the ABC News Livestream: https://bit.ly/3rzBHum SUBSCRIBE to ABC News: https://bit.ly/2vZb6yP WATCH MORE on http://abcnews.go.com/ LIKE ABC News on FACEBOOK: https://www.facebook.com/abcnews FOLLOW ABC News on TWITTER: https://twitter.com/abc #abcnlupdate #biden #trump #pennsylvania