WASHINGTON (AP) — The next phase of President Barack Obama's evolving position on gay marriage may come Thursday, the deadline for his administration to weigh in on a landmark Supreme Court case that could determine whether same-sex couples have a constitutional right to wed.

Gay rights supporters are pressing the administration to file a friend-of-the-court brief urging the justices to overturn California's gay marriage ban. Obama is not required to file a brief, though he raised expectations in his second inaugural address when he declared that gays and lesbians must be "treated like anyone else under the law."

An administration brief would not be legally binding. But it could offer the clearest insight into Obama's views on gay marriage, which he supports but has said should be governed by the states.