In every Presidency there are times when a President must invest personal time, energy, and political capital in diplomacy.

This President for 6 long years has refused to make any personal "diplomacy" investments. Why?

My Hypothesis: He is lazy, scared, and lacks the basic listening skills.  Let me explore each reason. Lazy. Diplomacy must be a 24/7 operation at times to succeed. This President considers his personal comforts to be more important than an all night negotiating session.  Scared.  If he tries and fails he will be crushed, so he does not try.  Lacks Basic Listening Skills.  Successful diplomacy requires a keen understanding of both sides.  A nuanced listening for the little details that makes for openings later in the process.  A sustained commitment for success. He does not possess any of the listening skills.

Who suffers for his unwillingness to represent America in Diplomacy?  Soldiers die, War Costs Increase, The Likelihood of Success diminishes, just about everyone in the world but him.