FILE -- Steve Bannon campaigns for Republican Senate candidate Roy Moore in Midland City, Ala., Dec. 11, 2017. President Donald Trump essentially excommunicated his onetime chief strategist on Jan. 3, 2018, saying that Bannon had “lost his mind” in response to reports that Bannon, in a book, described Donald Trump Jr.’s meeting with Russians as “treasonous” and “unpatriotic.” (Audra Melton/The New York Times)