Diplomacy is a myth.
Diplomacy is a game of mutual interests or raw force. Trump understands diplomacy better than any President in my lifetime to include Reagan.
He built a bigger stick - American economic, energy, and military power and offers great carrots that benefit both parties. He is so smart he has used economics and energy to great effect when many past Presidents only relied on military force.
I hope we get to see what he can accomplish with four more years.