WASHINGTON (AP) -- Defying a veto threat, the Democratic-controlled Senate narrowly signaled support Tuesday for the withdrawal of U.S. combat troops from Iraq by next March.

• 华盛顿(美联社)--尽管布什总统威胁要动用否决权，但是民主党领导的参议院仍以微弱优势在星期二通过了一项决议，该项决定要求美军在明年三月撤离伊拉克。