Trinamool Congress MP Abhishek Banerjee was grilled for 11 hours by Enforcement Directorate (ED) in West Bengal's Kolkata on Monday in connection with the alleged teacher recruitment scam.
At the same time, he was expected to appear before the Lok Sabha speaker on a tight deadline to put forth his side before a decision is made on the fate of TMC amid rebellion by party's MPs.
TMC is facing an existential crisis as 20 out of the total 29 Lok Sabha MPs of the party have rebelled to join the Nationalist Citizens Party of India and indicated their support for the Bharatiya Janata Party-led National Democratic Alliance.
The current strength of TMC MPs in Lok Sabha is 28, while by-elections are due in Basirhat due to the demise of Nurul Islam.
Abhishek was asked to appear before the Speaker as the latter seeks to hear arguments of both sides before making a decision on rebel TMC MPs merger request.
He was given a two-hour deadline to meet the Speaker in Delhi by 4 pm the same day, but sought a later date and time for the meeting.
Abhishek has been grilled by ED for 19.5 hours in connection with multiple cases, including the alleged teacher recruitment scam and forged signature case.