CHENNAI: "Why don’t you join the BJP?" This is what the Enforcement Directorate (ED) asked the arrested Tamil Nadu Minister V Senthil Balaji, when the latter was under the central agency’s custody for five days in connection with a cash-for-jobs scam.Senior advocate Kapil Sibal told this to Chennai district principal sessions judge S Alli on Friday, when Senthil Balaji’s plea for release on bail...