Jerome Corsi, a conspiracy theorist with links to both ex-Trump aide Roger Stone and Infowars host Alex Jones, has been subpoenaed to testify before a federal grand jury in Washington, D.C., Friday as part of special counsel Robert Mueller’s probe, his attorney says. Corsi, who has written such books as "Where’s the Birth Certificate?" and "Killing the Deep State: The Fight to Save President Trump" will fully comply with the Mueller team’s subpoena, according to attorney David Gray. The subpoena was first reported by the New York Times. Gray told NBC News he expects his client will be questioned about...