who availed the longest term as president of indian national congress
List of Presidents of the Indian National Congress During 2000â€“09, INC did not host a conference for the first time in history. In 2004, when the INC was voted back into power, Manmohan Singh became the first Prime Minister, not to be the president of the party. Sonia Gandhi is the longest serving president of the Congress party, having held the office for nineteen years from 1998 to 2017.[1] Her son Rahul Gandhi is the current Congress President.