The formal vote echoes Thursday night’s action, when the House approved adding the amendment to the Pentagon bill by 234-191.
Friday’s vote came hours after U.S. Defense Secretary Robert Gates told military members the repeal measure would allow a policy change only after thorough review by the Obama administration.
Since 1993, when “don’t ask, don’t tell” was introduced, more than 14,000 servicemen and women have been discharged because of their sexual orientation, and tens of thousands of others have voluntarily ended their military careers.
The Senate is expected to take up the defense bill this summer. Supporters likely will need the votes of 60 of the 100 senators to prevent opponents from blocking it.