Embroiled in a succession war with his estranged brother M K Alagiri, DMK working president M K Stalin on Wednesday said he would "not be cowed down" by any flutter and vowed to overcome any challenges emanating from within or outside the party.

Stalin made the remarks in a letter to his partymen. "I was raised by Kalaignar; (I) will not be cowed down by (any) flutter. I will overcome any challenges being created from within and outside the party with the help of the dear supporters of Kalaignar," he said.