Mr. Hannity, the Fox News host and political commentator, is one of the most dominant voices in conservative news media, reaching millions each day. But much of his influence comes from a powerful audience of one. Mr. Hannity spoke with Matthew Shaer, a contributing writer for The New York Times...

The Breitbart News executive chairman and former White House chief strategist, is building a shadow party behind the G.O.P. that he hopes will drive out the establishment. Mr. Bannon spoke with Jeremy W. Peters, a reporter for The New York Times, about his populist movement, his goal of ousting...