I got this one from a Ghanian

 United States President George Bush came for an official visit to Nigeria. He asked OBJ why everywhere is in darkness and obasanjo who felt disgraced kept mum on the issue. Few months later OBJ visited BUSH in his Country and was looking for a way to nail him too. He requested for a drive round the states and he was busy looking for a house without electricity, On sighthing one, he was happy and he said, Bush why is that house in darkness? "He smiled", Bush said, Oh, Sorry i did not tell you, that is Nigerian embassy.

Sounds funny but  dullard