These include rifts with his early allies such as Jamukha (who also wanted to be a ruler of Mongol tribes) and Wang Khan (his and his father's ally), his son Jochi, and problems with the most important shaman, who was allegedly trying to drive a wedge between him and his loyal brother Khasar.
An important shaman was alleged to be trying to distance Genghis Khan from which of his brothers?
Khasar