ABC News' Katherine Faulders says the eldest daughter of former President Donald Trump knows vital information regarding Trump's missing phone logs and state of mind. 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 #ABCNL #IvankaTrump #DonaldTrump #Jan6th #Testifies