WASHINGTON — President George W. Bush pulled the plug on the nomination of Clayton businessman Sam Fox to be ambassador to Belgium after learning just minutes before Wednesday's confirmation hearing that Democrats had the votes to defeat him. A solid wall of Democrats on the Senate Foreign Relations Committee planned to oppose Fox because of his donations to the Swift Boat Veterans for Truth, which denigrated the Vietnam War service of 2004 Democratic presidential nominee John Kerry, a panel member. On Tuesday, veterans who served with Kerry wrote panel members urging them to oppose the nomination. "My understanding is the...