Illinois Governor Pat Quinn is sounding less confident in his support for a gay marriage bill.

Last week, openly gay Representatives Greg Harris, Deb Mell and Kelly Cassidy introduced a measure that seeks to make Illinois the eighth state to legalize gay marriage.

Quinn strongly backed efforts to approve a civil unions bill while campaigning for reelection against Republican State Senator Bill Brady, an opponent of government recognition of gay unions and a supporter of an effort to define marriage as a heterosexual union in the Illinois Constitution.

After defeating Brady, Quinn went on to sign the civil unions bill into law.

“We believe in civil rights, and we believe in civil unions,” Quinn said during the signing ceremony. “We believe in liberty and justice for all.”

While campaigning for reelection, Quinn also endorsed giving gay couples the right to marry, telling the Daily Herald that he wouldn't “stand in the way,” if “the voters of Illinois want to have it come to pass.”

The Associated Press reported on Tuesday that Quinn is not sure of his support of gay marriage.

Quinn reportedly said he wants to study the issues surrounding marriage equality before he makes a decision.