The Guardian view on the US and South Africa: Trump looks to his base and partners look elsewhere

The most telling moment of Donald Trump's meeting with Cyril Ramaphosa was not the cynical screening of footage promoting false claims of "white genocide" in South Africa. It was when a reporter asked the US president what he wanted his counterpart to do about it. Mr Trump replied: "I don't know." Leaders enter the Oval Office uneasily, especially since the kicking administered to Volodymyr Zelenskyy. The South African president came armed with gratitude, two golf stars, a billionaire and compliments on the decor - and kept a cool head and a straight face as he was ambushed. Mr Ramaphosa later…