The New York Times reported Thursday that the CIA had planned to use the private security contractor Blackwater to carry out assassinations of al Qaeda leaders.
Six other current and former senior intelligence officials said they too had been briefed about Panetta's frustrations in the job, including dealing with his former Democratic colleagues in the House of Representatives.
One of the officials said the White House had begun informal discussions with candidates who were runners-up to Panetta in the CIA director selection process last year.
One of the candidates reportedly has begun a series of preparatory briefings.
"It would be a shame if such as talented a Washington hand as Panetta were to leave after one year," said Richard Clarke, an ABC News consultant who worked on the national security team for the Clinton and Bush administrations and served as an adviser to President-elect Obama.
"It takes that long for any senior bureaucrat to begin to understand what needs to get done and how to do it, "said Clarke. "The CIA needs some stability."