Principal Sessions Court Judge Jaichandran summoned Elangovan to appear before the court personally on or before August 4.
In an interview to a TV channel in April, Elangovan had allegedly made derogatory remarks against the state governor K Rosaiah and chief minister Jayalalithaa.
The court also issued summons to Editor of Tamil bi-weekly 'Nakkeeran', R R Gopal, its Special Correspondent Damodharan Prakash and reporter Arun to appear before it on or before August 5 for publishing an article in its May issue which allegedly contained defamatory references to the chief minister.