Congress today dismissed as mere speculation reports that it may join hands with AIADMK in Tamil Nadu ahead of Assembly polls next year. Party spokesman Shakeel Ahmed said, there is no question of dumping DMK, which is a trusted ally. He said, it is mere speculation as both Congress and DMK have a very good working relationship and both parties are together for the last two Lok Sabha elections. AIADMK supremo Jayalalithaa had dropped hints in Chennai on Tuesday that she is open to joining hands with Congress.<br/>