President Bush spared former White House aide I. Lewis “Scooter” Libby from a 2 1/2-year prison term in the CIA leak investigation Monday, delivering a political thunderbolt in the highly charged criminal case. Bush said the sentence was just too harsh.

Bush’s move came just five hours after a federal appeals panel ruled that Libby could not delay his prison term. That meant Libby was likely to have to report soon, and it put new pressure on the president, who had been sidestepping calls by Libby’s allies to pardon Vice President Dick Cheney’s former chief of staff.