Minnesota Congresswoman Michele Bachmann on Monday returned to Iowa to remind voters in that early caucus state that she opposes gay marriage, POLITICO.com reported.

Bachmann, who has yet to declare her candidacy for the 2012 GOP presidential nomination, continued to court social conservatives at an event sponsored by Bob Vander Plaats' Christian conservative group The Family Leader.

The Republican who as a state senator twice spearheaded unsuccessful efforts in Minnesota to constitutionally ban gay marriage railed against the institution at the group's most recent presidential lecture series installment.

“In 5,000 years of recorded human history … neither in the east or in the west … has any society ever defined marriage as anything other than between men and women,” Bachmann told attendees. “Not one in 5,000 years of recorded human history. That's an astounding fact and it isn't until the last 12 years or so that we have seen for the first time in recorded human history marriage defined as anything other than between men and between women.”

Last month, Bachmann thanked Iowa voters for ousting three state Supreme Court justices who favored gay marriage.