Brian Brown, the president of the National Organization for Marriage (NOM), believes opponents of gay marriage will prevail with passage of a federal marriage amendment.

In a blog post outlining the group's strategy to reverse the gains of marriage equality supporters, Brown notes that opponents have “faced tough battles before – and prevailed.”

“We passed Proposition 8 in California, when everyone said it would be impossible!” Brown wrote. “It was only through judicial and political corruption that politicians like [Governor] Jerry Brown and [Attorney General] Kamala Harris were able to abandon the voters, and a single homosexual judge was allowed to invalidate it.”

“We're demanding that the [Rep. Tim] Huelskamp marriage protection amendment come before the full House of Representatives for a vote,” he added.

(Related: Tim Huelskamp's proposed federal gay marriage ban has 28 co-sponsors.)

Proposition 8 was found to be in violation of the U.S. Constitution after a federal judge held a groundbreaking 13-day trial. Brown pointed to its demise in the course of advocating for a similar federal version of the ban.

Brown added that NOM is also working “to win the fight for marriage in the court of public opinion and in the culture at large.”