Deliberations in the West Wing.

Michael Isikoff sheds some light on the subject, noting the deliberations in the West Wing.

The president was conflicted. He hated the idea that a loyal aide would serve time. Hanging over his deliberations was Cheney, who had said he was “very disappointed” with the jury’s verdict. Cheney did not directly weigh in with Fielding, but nobody involved had any doubt where he stood. “I’m not sure Bush had a choice,” says one of the advisers. “If he didn’t act, it would have caused a fracture with the vice president.”