Breitbart, the alt-right news site whose executive chairman Steve Bannon was pushed out in January after feuding with President Donald Trump, has lost about half its readership according to comScore, raising questions about its future. The site dropped from 15 million unique visitors in October, per comScore, to 13.7 million in November, 9.9 million in December, 8.5 million in January and 7.8 million in February.