Sen. Susan Collins (Maine) will back a repeal of the military's "Don't ask, don't tell" policy.
The Associated Press said Collins will support the legislation crafted in a deal announced last night that would abolish the military's ban on openly gay and lesbian servicemembers.
Collins's announcement gives key Republican backing to the measure, spearheaded by Democrats.
Other top Republicans have expressed skittishness toward the repeal at this point. Sen. John McCain (R-Ariz.), the ranking member of the Senate Armed Services Committee, lamented an effort to move the issue too quickly, while Sen. Scott Brown (R-Mass.) said it is "premature" to move forward with the repeal at this point.