Arvind Kejriwal on Thursday said voters in Goa can sue Aam Aadmi Party candidates if they defect to other parties once elected to the assembly. READ: AAP's CM candidate bought Maserati with hard-earned money, not by robbing people of Goa: Kejriwal Arvind Kejriwal also categorically ruled out any pre-poll understanding with the Congress party in Goa. Why Amit Palekar as …