Brian Brown, president of the National Organization for Marriage (NOM), is predicting victory for his side in “Roe decision for marriage.”

The Supreme Court on Wednesday is expected to hand down rulings in two cases related to gay marriage. The cases, which were heard by the justices in March, challenge the constitutionality of Proposition 8, California's gay marriage ban, and the Defense of Marriage Act (DOMA), which prohibits federal agencies from recognizing the legal marriages of gay and lesbian couples.

Brown, who leads the nation's most vociferous group opposed to marriage equality, told the National Review Online's Betsy Woodruff that he's confident of a win at the Supreme Court.

“We're thinking we're going to win,” Brown said. “And I think that even the other side realizes that they're not going to get the decision they want.”

“This is like the life movement winning Roe. This is the Roe decision for marriage. This is not trying to nibble at the edges; this is trying to claim that there is a Constitutional right to redefine marriage. If they lose that, then the highest court in the land will be saying one of their key arguments is wrong, and that will have a big, big, big impact.”