George Mamo is the executive vice president of the International Fellowship of Christians and Jews and executive director of Stand for Israel, an IFCJ project.

Steve Strang is the founder and CEO of Charisma Media (formerly Strang Communications).

The National Organization for Marriage lists its mission as “to protect marriage and the faith communities that sustain it.”

The Institute for Marriage and Public Policy, based in Manassas, Va., posts research briefs on marriage-related topics. The institute also hosts a Marriage Debate blog.

The Family Research Council is a Christian organization promoting the traditional family unit and the Judeo-Christian value system. Press contacts are J.P. Duffy or Alice Chao.

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

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.

Rabbi Yechiel Z. Eckstein is founder and president of the International Fellowship of Christians and Jews. In 2005, Eckstein was appointed Goodwill Ambassador to the State of Israel. Contact through Tönya Derrickson.