"The PDP has become a collaborator for fascist RSS (Rashtriya Swayamsevak Sangh)-governed BJP," Karra told reporters here.
Elected to the Lok Sabha in 2014, Karra was a close aide of the late Chief Minister Mufti Mohammed Sayeed and was one of the founding members of the Peoples Democratic Party (PDP).
He had always opposed the idea of a PDP-BJP alliance and made his dissent known earlier also.
The resignation comes as the Kashmir Valley is battling months of the deadliest unrest it has suffered in six years. Over 80 people have been killed and thousands injured in clashes with security forces.
