Nairobi - A spokesman for Kenyan Prime Minister Raila Odinga Sunday poured scorn on attempts by right-wing activists to discredit US presidential candidate Barack Obama through his Kenyan heritage. Celeste and Loren Davis, American Christian missionaries active in Africa, have been circulating a chain mail claiming that Odinga and Obama are cousins, that Odinga is a socialist "trained in East Germany" and that Obama is a Muslim.