Andrew Sabisky has quit his role in the government after Boris Johnson faced calls for to sack him for his offensive remarks about race.
The Number 10 advisor is understood to have been appointed in response to senior aide Dominic advertising for “misfits and weirdos” to work with him.
Tonight the 27-year-old tweeted: “Hey all, The media hysteria about my old stuff online is mad but I wanted to help HMG not be a distraction. Accordingly I’ve decided to resign as a contractor. I hope no.10 hires more ppl w/ good geopolitical forecasting track records & that media learn to stop selective quoting.”
In a 2014 post on Mr Cummings’ website, Mr Sabisky wrote: “One way to get around the problems of unplanned pregnancies creating a permanent underclass would be rks on legally enforce universal uptake of long-term contraception at the onset of puberty. Vaccination laws give it a precedent, I would argue.”
Asked whether Mr Johnson thought this was a good idea, his deputy spokesman said: “The Prime Minister’s views are well publicised and documented.”
In another blog post, Mr Sabisky wrote: “If the mean black American IQ is (best estimate based on a century’s worth of data) around 85, as compared to a mean white American IQ of 100, then if IQ is normally distributed, you will see a far greater percentage of blacks than whites in the range of IQs 75 or below, at which point we are close to the typical boundary for mild mental retardation.”