The nation's most vociferous opponent of marriage equality ended 2013 millions in debt.

According to an analysis of the National Organization for Marriage's (NOM) 2013 tax filings done by the Human Rights Campaign (HRC), the nation's largest LGBT rights advocate, NOM raised $5.1 million last year, a drop of over 50 percent since 2012. Over half of the organization's funding came from just 2 donors. And NOM ended 2013 more than $2.5 million in debt.

“NOM should start figuring out that people aren't willing to give their hard-earned money to an extremist agenda that's going nowhere,” said Fred Sainz, vice president of communications at HRC. “If I were [NOM President] Brian Brown, I'd be worried that my two or three mega-donors are soon going to come to terms with the fact that they'd largely be better off flushing money down the toilet.”

“Americans certainly aren't buying what NOM is selling,” Sainz added, “and it's only a matter of time before the trickle of money keeping the lights on at NOM HQ dries up.”

As president of Rights Equal Rights, Fred Karger has pursued NOM in various states, filing charges of campaign violations.

“The NOM ship is sinking and going down fast,” Karger said in an emailed statement. “Under Brian Brown's leadership, the funding to NOM's 501(c)4 political operation was down 50% in 2013 and 70% to its 501(c)3 charitable arm. It's relying on just two donors now for most of its revenue.”