Rahul Gandhi set to take over from Sonia Gandhi, who led Congress for 19 years

Sonia Gandhi became Congress president in 1998.

Pic courtesy: PTI (File image)

New Delhi: Rahul Gandhi has been elected unopposed as Congress president, party's central election authority head Mullappally Ramachandran announced on Monday.

He will collect the certificate formally declaring his ascension to the post on December 16, he told reporters in the national capital.

The 47-year-old scion of the Nehru-Gandhi family was the lone candidate in the fray.

Rahul succeeds his mother Sonia Gandhi, who remained in the post for 19 years.

Here's a look at the tenure of Sonia as the Congress chief:

- After her husband, Rajiv Gandhi's assassination in 1991, Sonia refused to become PM and the party settled on the choice of PV Narasimha Rao who became the leader and subsequently PM.

- The Congress lost the 1996 elections and several senior leaders such as Madhavrao Sindhia, Rajesh Pilot, Narayan Dutt Tiwari, Arjun Singh, P Chidambaram and Jayanthi Natarajan revolted openly against incumbent president Sitaram Kesri.

- In an effort to revive the party's sagging fortunes, Sonia joined the Congress as a primary member in the Calcutta Plenary Session in 1997 and became party chief in 1998.

- At that time, a fragmented Congress had just lost the Assembly elections in Madhya Pradesh, Odisha, Mizoram and Nagaland. It had 141 members in the Lok Sabha. 

- In May 1999, three senior leaders of the party, Sharad Pawar, PA Sangma, and Tariq Anwar challenged her right to try to become India's PM citing her foreign origins.

- Following this Sonia offered to resign as party leader. This resulted in an outpouring of support and the expulsion of the three rebels from the party. They went on to form the Nationalist Congress Party.

- She contested Lok Sabha elections from Bellary, Karnataka and Amethi, Uttar Pradesh in 1999 and won both seats. However, Sonia chose to represent Amethi.

- In Bellary, she had defeated BJP leader, Sushma Swaraj.

- Sonia was elected the Leader of the Opposition of the 13th Lok Sabha in 1999 when the BJP-led NDA formed government at Centre under Atal Bihari Vajpayee.

- As Leader of Opposition, she had called a no-confidence motion against the Vajpayee government in 2003.

- Taking on the BJP, Sonia launched a nationwide campaign countering the NDA government's 'India Shining' slogan.

- The Congress on its own won 206 seats in the Lok Sabha seats, which was then the highest total by any party since 1991.

- Sonia was re-elected to a third term as MP from Rae Bareli.

- Following the unexpected defeat of the NDA, she was unanimously chosen to lead a 15-party coalition government with the support of the Left, which was named the United Progressive Alliance (UPA).

- The BJP protested at Sonia becoming PM due to her  'foreign origin'. Swaraj threatened to shave her head and "sleep on the ground" should Sonia become PM. The BJP also claimed that there were legal reasons that barred her from becoming India's PM.

- Subsequently, Sonia recommended Manmohan Singh as her choice as PM. Congress leaders and party workers compared it to the Indian tradition of renunciation.

- The Congress-led UPA returned back to power based on strong results in Andhra Pradesh, Kerala, Maharashtra, Rajasthan, Tamil Nadu, Uttar Pradesh and West Bengal. 

- Manmohan Singh became the first PM since Jawaharlal Nehru in 1962 to be re-elected after completing a full five-year term.

- In 2013, she became the first person to serve as Congress chief for 15 years consecutively.

- However, in the 2014 General Election, facing the 'Modi wave' the Congress-led UPA electoral alliance suffered massive defeat, winning only 44 and 59 seats respectively.