Nigeria, July 10 -- It's hard not to love US President Donald Trump. He is the world's most powerful president and wears his preeminence on his sleeve. Not for him the crooked modesty of the Chinese or the boring self-effacement of the British.

Six months after his second inauguration, it's been one day, one Trump. Two of his latest alter egos have been his invitation to the White House to five African heads of state, and his threat to impose an additional 10 percent tariff on any country that gets too close to the BRICS - Brazil, Russia, India, China and South Africa - middle-level powers trying to find a common ground and chart a trading system outside the dollar.

That beautiful word

First, the BRICS story. In response to BRICS leade...