B of A's board shakeup may presage Ken Lewis' exit

Just how close is Bank of America (BAC) CEO Ken Lewis to losing his job? With Citigroup (C) chief executive Vikram Pandit reportedly in the government's crosshairs, Lewis may find himself the next target for regulators seeking to shake up troubled banks' corner offices.

Lewis has already lost one job in recent months: He was Bank of America's chairman until shareholders stripped him of that position at the company's annual meeting in April. He was replaced by board member Walter Massey, former president of Morehouse College in Atlanta.