The Chicago Jewish Historical Society chronicles the history, life and experience of that city’s Jews.

The Jewish Historical Society of MetroWest concentrates on the Jewish experience in Essex, Morris, Sussex and portions of northern Union counties of New Jersey. Linda Forgosh is executive director.

The Jewish Historical Society of Central Jersey serves the communities of Middlesex, Union, Somerset, Warren and Hunterdon counties in New Jersey. It is in New Brunswick.

The Jewish Historical Society of Greater New Haven focuses on the Jewish culture and history in and around New Haven, Conn. Judith Schiff is executive director.

The Alliance for Marriage has pushed for a constitutional amendment banning same-sex marriages nationwide.

The Jewish Historical Society of Greater Hartford is in Hartford, Conn. Estelle Kafer is executive director.

The Alliance Defense Fund opposes same-sex marriage and efforts to circumvent DOMA.

The United for Marriage Coalition is an umbrella group advocating for marriage rights for gays and lesbians. Faith groups (and nontheist organizations) are among the group’s members.

Lambda Legal works to achieve full recognition of rights, including marriage, for LGBT people.