National Democratic Alliance (NDA) (IAST: Rāṣṭrīya Janatāṃtrika Gaṭhabaṃdhana) is an Indian big tent political alliance led by the right-wing Bharatiya Janata Party (BJP). It was founded in 1998 and currently controls the government of India as well as the government of 17 Indian states, and 3 Union Territories.
The NDA was formed in May 1998 as a coalition to contest the general elections. The main aim of the NDA was to form an anti-Indian National Congress coalition. It was led by the BJP, and included several regional parties, including the Samta Party and the AIADMK, as well as Shiv Sena, But Shiv Sena broke away from the alliance in 2019 to join the Congress led United Progressive Alliance.
Its first chairman was Prime Minister Atal Bihari Vajpayee. L. K. Advani, the former Deputy Prime Minister, took over as chairman in 2004 and served until 2014, and Amit Shah has been the chairman since 2014.