The eldest son of former President Donald Trump will be the first of his siblings to testify in the civil fraud trial that threatens to tear the family real estate business apart. SUBSCRIBE to ABC News on YouTube: bit.ly/2vZb6yP Latest updates: abcnews.go.com Watch FULL EPISODES on Hulu: abcn.ws/3bzvQQn #news #trump #trumpjr #trial #gma