The National Organization for Marriage (NOM) has launched another attack against New York State Senators Mark Grisanti, Roy McDonald, Stephen Saland and James Alesi for their votes in favor of a gay marriage law.

NOM, the nation's most vociferous opponent of marriage equality, is delivering on its promise to work against the reelection bids of any Republican who voted for the law, which went into effect in July.

A billboard located in McDonald's district reads: “Roy McDonald, You're Fired!”

“This is not going to end,” NOM President Brian Brown told the New York Daily News. “This is what this campaign is going to be from here on out. We are not going to rest until the people of this state get a vote.”

Brown added that the group is spending about $40,000 on billboards aimed at the four Republicans.

A Grisanti spokesman brushed aside the attacks: “People need to get over it because the simple fact is that everyone should enjoy the same rights. This just rolls off our back.”

“They are entitled to their opinion; it is a free country,” said Mike Veitch, a spokesman for McDonald.

In June, the group announced a 4-year plan to repeal the law. The plan hinges on growing a majority in the Legislature to approve a constitutional amendment for the 2015 ballot.