A new group announced Thursday says it will work to ensure that New Jersey does not become the 14th state to legalize gay marriage.

The New Jersey State Council Knights of Columbus, the New Jersey Family Policy Council, the New Jersey Catholic Conference, New Jersey Family First, League of American Families and the National Organization for Marriage (NOM) have united to create the New Jersey Coalition to Preserve and Protect Marriage.

The issue in New Jersey is being debated both in the Legislature, where supporters are looking to override Governor Chris Christie's 2012 veto of a marriage bill, and the courts, where a judge has ruled that the state must allow gay couples to marry beginning October 21. Christie, a Republican, has appealed the ruling to the New Jersey Supreme Court.

“We are confident that the administration will prevail in its appeal,” Don Sico with the New Jersey Catholic Conference told reporters attending a press conference at the State House in Trenton. “We are equally confident that proponents of same-sex marriage will be unable to muster the necessary two-thirds votes to prevail on the override. In fact, we will work very hard in the days and weeks ahead to make sure they do not. It is one of the reasons our coalition has been formed.”

Jim White, who is with the Knights of Columbus, insisted that including gay couples in marriage would lead to the legalization of plural marriage.

“Keep in mind that the issue under discussion is marriage not homosexuality,” White said. “If same-sex marriage should become legal, other groups currently barred from marriage will ask to marry. There will be demands for [the] legalization of polygamy, polyandry, group marriage and marriage even between siblings.”

The group said that the issue should be put to a public vote.

(Related: Third New Jersey Assembly Republican comes out for gay marriage.)