President Obama’s decision to pull all U.S. forces out of Iraq by Dec. 31 is an “absolute disaster” that puts the burgeoning Arab democracy at risk of an Iranian “strangling,” said an architect of the 2007 troop surge that turned around a losing war. Retired ArmyGen. John M. Keane was at the forefront of persuading President George W. Bush to scuttle a static counterinsurgency strategy and replace it with 30,000 reinforcements and a more activist, street-by-street counterterrorism tactic. Today, even with that strategy producing a huge drop in daily attacks, Gen. Keane bluntly told The Washington Times that the United...