Maryland is poised to become the sixth state to recognize same-sex marriage as proponents say they believe they have enough support to pass such a measure in the upcoming legislative session.

The expansion of gay rights appears to have gained significant traction as Maryland's General Assembly begins its 90-day session Wednesday. Not only are Democrats optimistic about their chances of approving same-sex marriage, but a leading Republican, sensing momentum on the issue, has instead countered with a proposal to grant civil unions to gay couples.