Rai, who has been associated with Kejriwal since his India Against Corruption (IAC) days, will be the new transport and labour minister of Delhi.
The 39-year-old unsuccessfully contested Assembly election from Babarpur in 2013, ending at third position. However, he bounced back this time and won with a margin of 35,000 votes against BJP's Naresh Gaur.
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He metamorphosed into a political activist and is credited to have built the party's volunteer base. He also participated in Anna Hazare's anti-graft movement, along with the AAP chief.
Like Sisodia, he too joined Kejriwal to form the Aam Aadmi Party. He is also a member of the Political Affairs Committee- party's apex decision making body.
On 13 December 2013, the fourth day of social activist Anna Hazare's indefinite hunger strike for passage of Jan Lokpal Bill in Ralegaon Siddhi, a verbal spat between VK Singh and Gopal Rai took place, forcing the Gandhian activist to ask Rai to leave the venue.