Not yet no. Not Tobi or Madara.
YES!that is why naruto is training to use the 9tail foxes demonic power to defeat Madara
i think sasuke will give naruto itachi's mangekyou sharing makin(sage mangekyou fox mode) then it will be madara vs sasuke and naruto
Now that he is about to master kyubi's chakra He can if he does that successfully
The actual question is "Will Naruto defeat Madara Uchiha?" It hasn't happened yet, you see.Because Naruto is the protagonist while Madara as the antagonist, chances are extremely high. If I were you, I would count on it.
Naruto would defeat Pein. Because when he is in Sage Mode + 8 Tails, Pein could hardly fend off. Pein was forced to run when Naruto went 8 Tails, so when the manga has finished, more definite answers, it should be published. But my conclusion is Naruto defeats Pein. Naruto wont defeat him Madara Uchiha will because Madara is the only person to face the nine tailed fox by himself and live.
Naruto has not killed Madara yet.
Naruto, obviously.
Well actually there is no episodes that shows naruto and madara fight each other yet.
Madara Uchiha is ultimately defeated in the anime series "Naruto" during the climactic events of the final arc, specifically in Episode 479, titled "The Last Battle." In this episode, Naruto and Sasuke, along with their allies, confront Madara after he achieves near-omnipotence with the Sage of Six Paths' powers. Ultimately, they manage to overpower him with their combined strength and strategies, leading to his defeat.
tobi is uchiha madara
This happened in Naruto Shippuden Chapter 678, Black Zetsu Betrays Madara.
No. Madara Uchiha is dead but will be revived in the world war by a forbidden jutsu. Tobi (the guy with the orange mask) is not Madara. It is Obito Uchiha. Check out Naruto manga 590-608.