WASHINGTON — The House on Friday overwhelmingly rejected calls for an immediate troop withdrawal from Iraq, a vote engineered by Republicans that was intended to fail. Democrats derided the vote as a political stunt. "Our troops have become the enemy. We need to change direction in Iraq," said Rep. John Murtha of Pennsylvania, a Democratic hawk whose call a day earlier for pulling out troops sparked a nasty, personal debate over the war. The House voted 403-3 to reject a nonbinding resolution offered by the GOP calling for the military to pull out of Iraq. "We want to make sure...