As the curtain closes on the presidency of George W. Bush, the one loose end dangling is the pardon of I. Lewis "Scooter" Libby. In 2007 Mr. Libby, Vice President Dick Cheney's chief of staff, was convicted for perjury and obstruction of justice. Let us be clear about the Bush legacy. After September 11, not a year into Mr. Bush's term, his became a war presidency. George Bush's place in history will turn on what becomes of Iraq and al Qaeda. If Iraq fails, history will mark down the Bush presidency. If by fits and starts Iraq grows into the...