According to sources close to him, he will concentrate now on Karnataka politics. The state is due to go the polls early next year.
Krishna served as chief minister of Karnataka between 1999 and 2004. Krishna wants to strengthen the Congress party in the state, the sources said.
Krishna is not keen to continue in his post because he has to frequently travel abroad and that is something the 80-year-old found very difficult at his age, the sources added. In fact, Krishna was supposed to leave on a foreign trip shortly.
It is noteworthy that a special court had yesterday ordered the Lokayukta police to probe the role of Krishna and two other former Karnataka CMs in the acquisition of land for the Bangalore-Mysore Expressway.
Interestingly, Congress spokesperson Rashid Alvi refused to confirm whether Krishna had submitted his resignation to the Prime Minister due to the aforementioned court order.
There is speculation that Krishna may be appointed as governor of Maharashtra. He was earlier governor of the same state from 2004 to 2008.