The Congress remained undecided over backing Shiv Sena in Maharashtra as the working committee of the party Congress Working Committee (CWC) met in Delhi on Monday.
The party's top decision-making body has authorized party president Sonia Gandhi to take the final call.
All eyes are now on Sonia Gandhi and Congress's ally Nationalist Congress Party (NCP) of Sharad Pawar stressing that it will decide on whether and how to support the Sena only when the Congress arrives at its decision.
The Sena, the second-largest party in the 288-member House with 56 MLAs after the BJP's 105 members, stepped up efforts to grab power in the politically crucial state.
