Board Thread:Theories and Speculation/@comment-34277398-20180522015234

So throughout the series, Kakashi, Jiraiya and Minato have all said that the only person they know of who was powerful enough to summon Kurama was Madara Uchiha, and yet we see Obito summon Kurama. Do they explain this? Is Obito actually as powerful as Madara? Or did Madara leave Obito something behind? 