Anwar, who has held preliminary talks with some Left leaders, told PTI that if the alliance with these parties materialises, it would be a credible tie-up at a time when the state is witnessing a tussle between communal forces and "opportunist" forces.
The former Union minister said that he also has plans to take along small regional parties in his grouping whose "enemy number one" will be BJP.
Bihar has some 18 per cent Muslim population, a majority of which had remained with Lalu Prasad's RJD which has been boasting the backing of MY (Muslim+Yadav) combination. A section of Muslims has also sided with Nitish Kumar.
Anwar said that the election is "not an easy one" for the grand alliance headed by Chief Minister Nitish Kumar given the fact that he was carrying a "10-year-long anti-incumbency".
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He said that the action by Kumar and Lalu would bring division in the secular vote as people who would be denied tickets by the grand alliance as also the BJP could rally round such a 'Third option'.
Anwar claimed the signal the 'grand alliance' has given by keeping him and his party out of it was that they are against projection of Muslim leadership.
"For long, they have been telling me that the NCP and I are part and parcel of the grand alliance and suddenly this thing happened without any consultation with us... It is political dishonesty," Anwar, who is among the founders of the Sharad Pawar-led party, said.
Asked whether there have been any reaching out by JD-U- RJD after it rejected three seats offered by them, he said, "We feel that they (Lalu-Nitish) don't need NCP and people like us, they didn't even feel the need to talk to us".