He said it was for the Congress leadership to decide who will be the party's prime ministerial candidate in the next Lok Sabha election, and if those unhappy in the NDA should be invited to join the UPA.
"That you have to ask the Congress party. I have my job cut out for me," he said, when asked if the Congress would name him the prime ministerial nominee.
About disgruntled NDA allies, he said: "These are internal matters of the Congress. Frankly, these decisions are not made by me. These decisions are made by senior leaders of the Congress."