Jayalalithaa arrives at her swearing-in ceremony as Tamil Nadu Chief Minister. (AFP Photo)

Her AIADMK party is the third largest force in the Lok Sabha, the lower house of Parliament. The AIADMK has 11 lawmakers in the Rajya Sabha or upper house, where the Narendra Modi government is in a minority and depends on regional parties like Ms Jayalalithaa's to pass key legislation.Pon Radhakrishnan of the BJP attended the oath ceremony today. In Delhi, Finance Minister Arun Jaitley congratulated her and said, "I want to congratulate the Chief Minister of Tamil Nadu. We wish her all the best."