The U.S. Senate approved an amendment Wednesday prohibiting the Bush administration from changing the federal student-aid formula.
The proposed changes endorsed by the Bush administration would lower the amount of tax families could deduct in the need-analysis formula.
According to the U.S. Department of Education, if the proposed changes were adopted, 84,000 students would lose their eligibility for Pell Grants.
The amendment, sponsored by New Jersey Senator Jon Corzine, passed by a vote of 50 to 45 as a number of Republicans crossed party lines to vote with Democrats.
The amendment, attached to a bill to finance the Departments of Labor, Education and Health and Human Services, now will go to a House-Senate conference committee.
"We need to be providing more opportunity for students who want to further their education, not less," Corzine said in a prepared statement.
Advocates praised the amendment as a "victory for students."