Though Lieberman said he gets "angry when I hear about fraud or corruption in the spending of American dollars," he said he in part chooses what to have hearings on by "watching who else is doing what," noting that [House oversight chairman Henry] Waxman has held several hearings on Iraq oversight, as have the Senate Armed Services and Foreign Relations committees.

"You've got to set your own priorities, and it was clear to me that other committees were going to pick this up," said Lieberman.