The Full form of NDA is National Democratic Alliance which is led by the BJP. It is an alliance of center-right and right wing political parties in India. The NDA was formed in May 1998 as a coalition to contest the general elections. It was led by the BJP, and included several regional parties, including the Samta Party and the AIADMK, as well as Shiv Sena. Late Prime Minister, Atal Bihari Vajpayee was the chairman of the NDA Party. The current chairman of the alliance is Amit Shah.
Also representing the alliance are L. K. Advani, former Deputy Prime Minister, Narendra Modi, current Prime Minister and the Leader of the House in Lok Sabha, and Thawar Chand Gehlot, Leader of the House in Rajya Sabha and Minister of Social Justice and Empowerment. The coalition ruled from 1998 to 2004 and returned to power in the 2014 General Elections with a combined vote share of 38.5%. Its leader, Narendra Modi, was sworn in as Prime Minister of India on 26 May 2014.
The National Democratic Alliance does not have a formal governing structure in place and it has been up to the leaders of the individual parties to make decisions on issues such as sharing of seats in elections, allocation of ministries and the issues that are raised in Parliament.