An excerpt from the FRC screed:

We, the undersigned, stand in solidarity with Family Research Council, American Family Association, Concerned Women of America, National Organization for Marriage, Liberty Counsel and other pro-family organizations that are working to protect and promote natural marriage and family. We support the vigorous but responsible exercise of the First Amendment rights of free speech and religious liberty that are the birthright of all Americans.

There you have it folks natural marriage and natural family. The bit about natural marriage is interesting considering that it is a man made convention.