Peter Summers/Getty Images Boris Johnson's chief adviser has hired a staffer — Andrew Sabisky — with an interest in eugenics. Today, Johnson's spokesperson repeatedly declined to say whether he agreed with Sabisky's views. Sabisky once said black people have lower IQs than white people, on average. The prime minister has made many controversial comments about minorities, women, and LGBT throughout his career. Visit Business Insider's homepage for more stories. A spokesperson for Boris Johnson today refused to say whether the prime minister agreed with a Downing Street employee's claim that black people are mentally inferior to white people. Andrew Sabisky was recruited by Johnson's chief adviser, Dominic Cummings.