The decision is expected to be announced in a day or two, sources said, indicating that some other changes could also be announced which includes replacing Punjab Congress chief Pratap Singh Bajwa.
The name of former minister Lal Singh is doing the rounds as Bajwa's replacement, sources said.
The party may announce some big-ticket changes in the next few days as it attempts to revamp the organization in the backdrop of a series of major electoral setbacks since the Lok Sabha poll loss last year, it is learnt.
This is the second successive defeat for Congress in Delhi after the December 2013 assembly polls in which it had won in only eight seats and its chief minister Sheila Dikshit had lost her home constituency New Delhi to Kejriwal.
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After the rout in assembly polls this year, both Maken and PCC chief Arvinder Singh Lovely submitted their resignation to Congress president Sonia Gandhi as AICC general secretary and PCC chief respectively.
After securing an all-time low 44 seats in Lok Sabha polls last year, Congress has lost assembly elections in Maharashtra, Haryana, Jammu and Kashmir, Jharkhand and Delhi.