Herman Cain's opposition to a constitutional amendment banning gay marriage has put the GOP candidate at odds with social conservatives.

Speaking Sunday on NBC's Meet the Press, Cain told host David Gregory that he “wouldn't seek a constitutional ban for same-sex marriage, but I am pro traditional marriage.”

The former CEO of Godfather's Pizza also stated his opposition to such an amendment during an earlier New Hampshire GOP debate.

The National Organization for Marriage (NOM), the nation's most vociferous opponent of marriage equality, continues to chide Cain for not signing their anti-gay marriage pledge.

Rick Santorum wasted no time in renewing his criticism of Cain's position: “Mr. Cain, Governor Perry and Congresswoman Bachmann all believe 50 different definitions of marriage is fine. But I strongly disagree and will continue fighting for traditional marriage between one man and one woman.”

In comments to The Washington Post, Penny Nance, executive director of Concerned Women for America, also blasted Cain: “States need an opportunity to choose a constitutional amendment. I find it disappointing Herman Cain doesn't see this as a viable option and is missing this opportunity.”

“I think he will find that position problematic,” she added.

Former presidential candidate and Christian conservative Gary Bauer said that Cain “misses the whole point.”

“The left will not permit each state to decide. They have mounted a well conceived plan to have the federal courts order every state to recognize the same-sex marriages performed in every other state. The Defense of Marriage Act prevents that now. Eventually a constitutional amendment will be needed.”