AIADMK leader M Thambidurai is all set to be elected unopposed as Deputy Speaker of Lok Sabha. Home Minister Rajnath Singh told reporters in New Delhi that Thambidurai has filed his nomination paper for the post. Sources said Congress will also support his candidature. Today is last date for the nomination and the election for the post is scheduled for tomorrow. Thambidurai is the leader of AIADMK in the House. He was Deputy Speaker of Lok Sabha from 1985 to 1989.