Forget standing upon a bully pulpit. President Donald Trump prefers to humiliate other leaders seated, in the Oval Office, before TV cameras. Consider the scene that unfolded this week with the visit of South African President Cyril Ramaphosa.

Ramaphosa stared straight ahead, wiping his face and occasionally moving in his seat and looking over at Trump, who wouldn’t make eye contact as a clip played of crowds repeatedly shouting “Kill the Boers,” a reference to White farmers descended from colonists who built and led the nation’s racist apartheid regime, according to The Post.

Ramaphosa said he’d “started practicing golf” and is ready to play with Trump. He also brought two legendary South African golfers—Ernie Els and Retief Goosen—into the Oval Office with ...