Lawmakers approved a proposal Friday to address potential security breaches on the Web site as Republicans seek to keep political attention focused on concerns with the ongoing rollout of the new federal health-care law.

On a vote of 291 to 122, more than five dozen Democrats joined with all voting Republicans to approve a measure that would require the Department of Health and Human Services to notify affected users of any potential breach of a state or federal exchange within two business days.

Republicans openly crowed at Friday's vote tally, boasting that 67 vulnerable Democrats were willing to buck President Obama, who signaled Thursday that he strongly opposed the proposal. The White House said the measure would create "unrealistic and costly paperwork requirements" that wouldn't improve the safety or security of the site's users.