In the 1999 parliamentary election he won the seat with 14750 votes, defeating former Prime Minister Surya Bahadur Thapa of the Rastriya Prajatantra Party.

[15] Mahato lost his seat in the 2013 constituent assembly elections to Mahendra Rai Yadav of the Terai Madesh Sadhbhawana Party Nepal.

For the same purpose a group of youth including Sanjeev Jha submitted an application to the then incumbent Home minister shakti Bahadur Basnet during First oli premiership.

[29] On 21 June 2021, a note was pasted on main gate of Singhadurbar by Naya Party to restrict the entry of Mahato in the premises.

On 22 June 2021, a complain numbered C035596 was lodged at CIAA, the concerned authority again to investigate his citizenship by advocate Birbhadra Joshi, Tulsi Ram Parajuli and Anil Bajgain.

[4] Demand for multi nation state On 4 June 2021, a group of PSP-N led by Mahantha Thakur accepted the proposal of PM KP Sharma Oli of joining the government.

Mahato included a line; “We remain committed to building an alternative power and will safeguard identity and rights of our people.

We will prepare for a nationwide movement to set up multi-nation state in Nepal.” The comment drew quick criticism on social media twitter, Facebook and tik-tok which accused Mr. Mahato of playing divisive politics.

On the other hand, protest was organised on Saturday by the All Nepal National Free Students Union (ANNFSU) that demanded prime-minister Oli to step down over the comments.