The AAP's key Maharashtra functionary Mayank Gandhi on Wednesday quit the party's national executive as he was "losing interest in politics".Gandhi, who has been embroiled in public brawls with the top leadership of the Aam Aadmi Party, announced his move in a terse tweet in the afternoon and requested he be relieved with immediate effect.Among other things, in the recent past, he had accused party chief and Delhi Chief Minister Arvind Kejriwal of indulging in "gutter politics and destroying the party".Gandhi had been associated with the Maharashtra AAP and was previously on the core committee of the India Against Corruption movement spearheaded by social activist Anna Hazare.On many occasions, he had criticised the party through blogs amid allegations that the Maharashtra and Mumbai units of the AAP were plagued by factionalism and favouritism.He had vociferously protested the sacking of AAP founder-members like Prashant Bhushan and Yogendra Yadav from the party's PAC in March this year and accused Kejriwal of silencing dissent.