JDU chief Nitish Kumar is likely to take oath as Bihar chief minister for a fourth successive term next week but the date has not been finalised yet, a close aide said on Thurday. Nitish Kumar has to tender his resignation to the governor. The newly elected MLAs of the NDA are yet to meet formally and elect Kumar as their leader. However, with top BJP leaders, including Prime Minister Narendra Modi, strongly endorsing Kumar as the chief minister, there are no doubts over a fourth straight term for him in the high office.