The BJP's loss in Karnataka may soon be compounded with a break with its only ally in Tamil Nadu, the AIADMK. The southern ally, already miffed by the controversial comments of state BJP chief K Annamalai, has given an ultimatum to the party: "Rein him in, or else...". Mr Annamalai, who divides his time equally between needling the DMK and AIADMK, has made a comment the ally finds it hard to overlook.