Canaris, a master of backroom dealings, thought he knew how to deal with Heydrich and Himmler. Though he tried to maintain a cordial relationship with them, the antagonism between the Abwehr and the SS did not stop when Canaris took over. Not only was competition with Heydrich and Himmler's intelligence operations a hindrance, so too were the redundant attempts by multiple organizations to control communications intelligence (COMINT) for the Reich.