Congress MP Shashi Tharoor on Friday asserted that he has a vision to strengthen the party which should be a vehicle for "change" as he filed his nomination for the party president poll.

Addressing a press conference after filing his papers, the former Union minister called his rival Mallikarjun Kharge, who is also contesting and is being seen as the favourite to win, `Bhishma Pitamah` of the Congress.