Newt Gingrich on Thursday called the patchwork of gay marriage laws a “mess” and called for a federal ban, media watchdog reported.

During a Gingrich Faith Leaders Coalition conference call, which included guest speakers Jim Garlow and J.C. Watts, Gingrich reiterated his support for a federal amendment that defines marriage as a heterosexual union and called for a federal law that would prohibit states from legalizing gay nuptials.

“I have a question regarding all the laws that people are trying to make for gay rights,” a female caller said. “I heard what you said about marriage being between a man and a woman and I agree, that's what God said in the very beginning in the Book of Genesis. But the laws of our land are seeing more and more states allowing gay marriage. How can we stop this? It is so profoundly wrong.”

“I think ultimately we're going to have to have a federal amendment because at the rate we're going, you might be able to pass a federal law, but at the rate we're going it's going to be just chaos, you're going to have some states that say it's all right and other states that say it's not all right. How are people going to travel? What are their legal rights? It is a mess,” Gingrich answered. “I think if we are going to defend marriage in the end it will probably require a federal law.”

“What's the difference, what they're saying between a woman wants to be with a woman, when is it going to be, 'I want to marry a dog' or 'I want to marry a cow'?” That makes as much sense. What they are saying is doing something stupid like that,” the woman responded.

Gingrich suggested that gay relationships were not moral: “[R]emember we have now had a whole two generations of teachers who explained to us, 'You shouldn't render moral judgment. After all it's situation ethics, who are we to decide?' and that's been a major problem.” (The audio is embedded in the right panel of this page. Visit our video library for more videos.)