Minnesota Congresswoman Michele Bachmann appears to have dropped her campaign against allowing gay couples to marry.

Bachmann, who is not seeking a fifth term, has a long history of attacking gay rights, though her strongest comments came while she served as a Minnesota lawmaker.

In 2004, then-Minnesota State Senator Bachmann unsuccessfully championed a constitutional amendment limiting marriage to heterosexual couples. In an urgent appeal to supporters Bachmann compared marriage equality to Pearl Harbor.

Recalling the events of December 7, 1941, Bachmann told supporters not to repeat the mistakes of military commanders who ignored the warnings of sailor Orville Ethier.

“You are a type of Orville Ethier – a patriot looking to secure American freedoms,” she wrote. “The question is, will the Senators of Minnesota act like the Honolulu military headquarters and ignore your message?”

“Today we face perhaps the greatest attack on the family in our lifetime. Now is OUR time to stand up and send a message to avert an equally impending disaster.”

In vying to become the 2012 GOP presidential candidate, Bachmann was the first candidate to sign a Christian conservative group's pledge in which she vowed to “vigorously” oppose same-sex marriage. Footnotes to the two-page document suggest that being gay is a choice and may have a negative impact on public health.

She's also criticized President Barack Obama's 2012 endorsement of marriage equality, saying it proves he's “out of touch” with “the values of American families.”

“I will continue to protect traditional marriage, despite our president's decision to thumb his nose at the traditional institution of marriage,” she added.

When asked about the issue Friday at the conservative Values Voter Summit, Bachmann said, “It's not an issue.”

“In fact, it's boring,” Bachmann told the Huffington Post's Michelangelo Signorile.

Asked to respond, Bryan Fischer, a spokesman for the the Christian conservative American Family Association, suggested Bachmann had “given up.”

“Well, I’d have to know more about what Representative Bachmann meant when she said that. The debate is far from settled,” he said. “We’ve got a long way to go. Unfortunately, there are people in the conservative movement who have sort of given up. There are even evangelicals leaders sending signals that the battle is over, that the battle is lost. 'We’ll never be able to capture the millennials. They’re gone.' I think it’s way premature for that. You know, when the homosexual lobby was 0 and 31 [having lost at the ballot in 31 states on marriage], the gay lobby didn’t quit. They didn’t give up. They didn’t do it. They didn’t give up, and neither are we.”