"Finally, I am going to hand over my resignation to the Vice President on October 11 and then I will tell the people of this country why I decided to end my long political innings with the Trinamool Congress (TMC), the party I founded with many others," Roy told reporters.
Though Roy has not yet divulged his future plans, but he is meeting leaders of various parties during his stay in Delhi.
He met the BJP's West Bengal BJP in-charge Kailash Vijayvargiya at the residence of Rajya Sabha House Committee chairperson Om Mathur today.
He also had a meeting with Finance Minister Arun Jaitley yesterday.
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Incidentally, Roy also had a long meeting with the West Bengal Congress president Adhir Ranjan Chowdhury on Saturday.
Chowdhury said that Roy has not proposed to join the Congress now, but claimed that he had done so earlier.
"Rahul Gandhi himself had enquired about what Mukul is doing? I told him that he is a leader with potential," Chowdhury told PTI.
Chowdhury said that the Congress earlier had reservations on Roy joining the party because of the cases against him.
The TMC had accused him of hobnobbing with the BJP.