Ellsberg was famous for exposing government deception on the US war in Vietnam and advocated for whistleblower rights.
Former US security contractor one of 75 foreign nationals listed by the decree as being granted Russian citizenship.
The lawsuit says mass interception and searching of citizens’ international communications are unconstitutional.
WikiLeaks founder and NSA whistleblower, seen by many as free-speech icons, not included in list of 73 pardons.