"I gave two decades to the Congress. The Congress is doing good and this is the time to join the movement against the BJP," she said.
Last month, she alleged that the party leadership was "weakening" her and said she is being accused of attempting to switch over to the Congress.
In December, Lamba said in a tweet that the AAP had asked her to support the resolution, which she refused. She then added that now she is ready to face any punishment because of her actions.
Lamba won the Chandni Chowk assembly seat in the 2013 Delhi polls. Before joining the AAP, Lamba was part of the Congress women's wing.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)