A week before Goa goes to polls and multi-cornered contests shaping up, senior Congress leader P Chidambaram on Monday termed the Trinamool Congress and the Aam Aadmi Party (AAP) as the parties of defectors. He also said that both these parties lacked a winning potential but they are dividing non-BJP votes. Addressing a public meeting at the Nuvem assembly constituency, he said that voters should not waste their votes by supporting the AAP or the TMC rather they should choose the NOTA (None of The Above) option.