The order also authorizes further investigation into those involved in the publication of the infamous letter.
It requires the "Director of National Intelligence, in consultation with the Director of the Central Intelligence Agency" to "revoke any current or active clearances" of the listed 51 individuals.
Former Director of National Intelligence James Clapper, former CIA Directors Mike Hayden, John Brennan, and Leon Panetta, and former National Security Advisor John Bolton are on the list.