Scott Atlas, neuroradiologist and fellow at Stanford’s conservative Hoover Institution, made controversial statements about lockdowns and school reopenings. (Video: The Washington Post, Photo: Jabin Botsford/The Washington Post)

As summer faded into autumn and the novel coronavirus continued to ravage the nation unabated, Scott Atlas, a neuroradiologist whose commentary on Fox News led President Trump to recruit him to the White House, consolidated his power over the government’s pandemic response.

Atlas shot down attempts to expand testing. He openly feuded with other doctors on the coronavirus task force and succeeded in largely sidelining them. He advanced fringe theories, such as that social distancing and mask-wearing were meaningless and would not have changed the course of the virus in several hard-hit areas. And he advocated allowing infections to spread naturally among most of the population while protecting the most vulnerable and those in nursing homes until the United States reaches herd immunity, which experts say would cause excess deaths, according to three current and former senior administration officials.