PM Modi hit out at AAP chief Arvind Kejriwal in a mega rally in Delhi on Saturday
To what is being called a Modi vs Kejriwal contest, the Congress is expected to add the name of Ajay Maken for assembly elections in Delhi, dates for which will be announced by the Election Commission today.
A single-day mid-February date for polling is expected to be announced.
The Delhi assembly was dissolved in November last year, after all three major parties - the BJP, the Congress, and Arvind Kejriwal's Aam Aadmi Party - said they were not in a position to form the government.
Delhi has not had a chief minister since Arvind Kejriwal resigned after 49 days in office in February last year. His party has appealed to Delhi to give it a majority and Mr Kejriwal the chance to be chief minister for a longer term this time.
Prime Minister Narendra Modi addressed a mega rally in Delhi on Saturday, telling voters why they must vote for his party and not AAP. "We need development here, not anarchy. They are good at dharnas
... we are good at running government," the PM said alluding to Mr Kejriwal's chosen method of protest even while he was chief minister.
The BJP is not projecting anyone as its chief ministerial candidate this time, extending the formula that has worked for it in state elections held since the party won a massive mandate at the Centre in national elections last year. It is seeking votes on Mr Modi's development plank.
The Congress - which ruled Delhi for 15 years but was decimated first in the assembly elections held in December 2013 and then in the Lok Sabha elections when it failed to win a single seat - is expected to draft former union minster Ajay Maken, 51, as its face to replace former chief minister Sheila Dikshit, 76, who has reportedly angered partymen by suggesting that the Congress could again support an AAP government post elections.
After the capital delivered a fractured mandate 13 months ago, single largest party BJP, a few seats short of a majority, had declined an invitation to form government.
The Aam Aadmi Party, which made a spectacular electoral debut by winning 27 seats, formed government with the external support of the Congress, which was reduced to a humiliating eight seats in the 70 member assembly.
That uneasy alliance ended when Mr Kejriwal resigned as chief minister on February 14, 2014, Valentine's Day.