Professor Gourav Vallabh joined the Bharatiya Janata Party hours after resigning from all posts and membership of the Congress party on Thursday. Citing reasons for his exit, he said that he can “neither raise anti-Sanatan slogans nor abuse weather creators” everyday.Vallabh is the third high-profile Congress leader to quit the party in two days after the exits of boxer Vijender Singh and Sanjay Nirupam.