Challenge to BJP chief's authority will create crisis: Rajnath

"The line of command rests only in the hands of the party president which is Nitin Gadkari. It is true that if the authority of the party president is challenged, there is bound to be a crisis but this hasn't happened in the BJP and I am confident that this won't happen with Nitin Gadkari either," he said.

Recalling that the results of the Lok Sabha elections were "not as per our expectations," Singh said, "Had we attained a good strength in the Lok Sabha, (L K) Advani would have definitely been the Prime Minister".

Asked if he regretted this, he told NDTV, "Yes, absolutely."

Hoping that Atal Bihari Vajpayee will play his role in the party once his health improves, Singh said, "As far as Advaniji is concerned, he is still active in politics and will be in the future."