Sinha said he had been trying for an audience with Prime Minister Narendra Modi and had sent numerous letters to him, but failed to elicit a response, something that prompted him to float a political action group called 'Rashtra Manch'.
He said one of the tasks before the Manch was to ensure that the NDA government's policies are aligned with the BJP's election manifesto.
"Why should I quit the BJP? I had toiled hard during 2004-14 when the UPA was in power. Let the party throw me out if it wants," Sinha told reporters on the sidelines of a seminar here on the Union Budget for 2018-19.
"My protest is to bring those back on track along the lines of the election manifesto of the BJP. I have been protesting for the last four years and this has culminated in the formation of the platform Rashtra Manch," Sinha said.
The Manch, he said, is a broad-based platform with people from many political parties and farmers' organisations.