Congress chief Mallikarjun Kharge told NDTV today that leading the party is a challenging task as he completes one year into the role. Mr Kharge said Sonia Gandhi and Rahul Gandhi have helped him a lot and they work as a team. "There is no difference of opinion with the Gandhis," Mr Kharge said. He said the Congress leadership will decide who will be the chief ministerial candidates in the states where elections will be held next week. He slammed the BJP-led centre over allegedly misusing central agencies to harass Congress leaders. "The Congress has to defeat four candidates, not one - the BJP candidate, CBI, ED and income tax," Mr Kharge said.