Bihar Chief Minister Nitish Kumar, who rejoined hands with BJP, said no one can beat Prime Minister Narendra Modi in the 2019 Lok Sabha elections.

The JDU president, who was speaking at a press conference in Patna on Monday, hailed Modi's way of taking decisions which he felt would take the country forward.

"I don't think anyone is suitable for that. There is nobody who has the capacity to take on Modi," Nitish Kumar said when asked about the next Lok Sabha elections in which he has been speculated as a possible Prime Ministerial candidate.

Nitish also defended his decision to tie up with the BJP ditching the RJD and the Congress and said his party will remain committed to the support already extended to opposition Vice President Candidate Gopalkrishna Gandhi.

He also hit back at Congress Vice President Rahul Gandhi on his remarks that he knew three months ago that the JD-U would tie up with the BJP in Bihar.

"If he knew it then he should have told me. When I decided to support (NDA Presidential candidate Ram Nath) Kovind I told them. I spoke to Rahul over the corruption charges against RJD leaders and asked him to suggest ways to come out of that so that I can speak outside."  

Nitish also revealed that the proposal for a reunion came from the "highest level" in the BJP which he accepted as "going got impossible" in the Grand Alliance due to accusations of corruption against his then deputy Tejashwi Yadav.

"There were corruption charges and cases were filed by the CBI (against Lalu Prasad and family). I had only told them to come out with proper answers. Instead, they made fun of me saying whether I was a CBI official or the police," he told media.

"The decision I took (last week) was in the interest of Bihar against corruption. I hope the central government will go ahead with its action in eliminating benami properties like it took in the case of demonetisation and ending black money. Add to this is the GST reform that will transform trade and make it tough for black money to be generated out of business," he added.

Nitish Kumar, who supported Modi on surgical strikes, demonetisation and elimination of Benami assets, said he did not need any certificate over his secular credentials.

"I fully believe in secularism, democracy, social justice and justice for all communities. In the cover of secularism no one has the right to amass huge properties. And secularism cannot be used as a cover up for corruption."

Nitish took oath as Bihar Chief Minister for the 6th time on Thursday and had comfortably won the confidence vote 131-108 on Friday.