A controversial Downing Street aide appointed just days ago has been forced out after becoming embroiled in a eugenics row. Andrew Sabisky, a so-called “super-forecaster”, is believed to have been brought in as a contractor last week as part of Dominic Cummings’ recruitment drive for “weirdos and misfits”. However, he on Monday claimed to have quit his role as a contractor amid a mounting backlash over a series of highly controversial comments he had made online. Announcing his departure on social media, Mr Sabisky said he had become the victim of a “giant character assassination” that would have impaired his ability to work. But Government insiders indicated that he had in fact been shown the door after senior officials became increasingly concerned over remarks unearthed by reporters in recent days. It is likely to prove an embarrassing setback for Mr Cummings, who is understood to have brought the researcher into Downing Street on a short-term contract to work on a series of special projects, including issues related to defence. Mr Cummings, who is the Prime Minister’s most senior adviser, is believed to be seeking to launch a review of the Ministry of Defence spending amid concern that billions of pounds if being wasted on procurement. It came just hours after Boris Johnson faced widespread criticism from MPs over the failure of his spokesman to condemn Mr Sabisky’s views on the intelligence of black people and compulsory birth control to prevent the creation of a “permanent underclass”. Asked about the comments on Monday morning, the Prime Minister’s official spokesman declined to comment, stating only that Mr Johnson’s views on the subject were “well publicised and well documented”. The refusal to say whether Mr Johnson shared his views were swiftly attacked by Caroline Nokes, a former Home Office minister, who expressed her disbelief at Downing Street’s response. Ms Nokes, who now chairs the Commons women and equalities committee, added that there “must be no place in Government for the views [Mr Sabisky has] expressed.” She was joined by William Wragg, the Tory MP for Hazel Grove, who added: “Andrew Sabisky’s presence in Number 10 is a poor reflection on the Government and there is no way to defend it. He needs to go. “I cannot be the only one uncomfortable with recent Number 10 trends.” As the row escalated, a Downing Street source insisted that the Prime Minister did not share Mr Sabisky’s views. But as more reports on Mr Sabisky’s stance on highly contentious issues continued to surface, it became apparent that his position was no longer sustainable. Confirming his resignation, Mr Sabisky hit out at “media hysteria”, adding that he had wanted to help the Government rather than become a “distraction”. “Accordingly I’ve decided to resign as a contractor. I hope Number 10 hires more people with good geopolitical forecasting track records. “I know this will disappoint a lot of people but I signed up to do real work, not be in the middle of a giant character assassination. If I can’t do the work properly there’s no point.”