In 2001, he broke away from the
Rashtriya Janata Dal to form
Rashtriya Janata Dal (Democratic) and was made Minister of State for Social Justice & Empowerment in the
Vajpayee government. He later merged
Rashtriya Janata Dal (Democratic) with the
Bhartiya Janata Party. Post
Bhartiya Janata Party lost power in the center, Nagmani joined
Ram Vilas Paswan's
Lok Janshakti Party before switch over to the
Janata Dal (United). His wife made a minister in the
Nitish Kumar government and he was elected in the
Bihar Legislative Council. Then he joined
Nationalist Congress Party but left ahead of the
2014 Lok Sabha elections and joined
All Jharkhand Students Union. In 2015, he formed
Samras Samaj Party announced the formation of a third front known as the Socialist Secular Morcha an alliance of six parties SP,
Nationalist Congress Party,
Jan Adhikar Party, Samras Samaj Party, (
National People's Party) and
Samajwadi Janata Party. In 2017, Nagmanai joined
Upendra Kushwaha's
Rashtriya Lok Samta Party by merging his party and calling Kushwaha to be next
Chief Minister of Bihar. He was named National Executive President of
Rashtriya Lok Samta Party but was sacked for allegedly indulging in anti-party activities in 2019. He resigned from the party. Following which he joined the
Janata Dal (United) but quit six months later. ==References==