Minnesota Rep. Michele Bachmann on Friday spoke to supporters of an amendment to the Minnesota Constitution that would define marriage as a heterosexual union, Minnesota Public Radio reported.

Bachmann, who dropped out of the GOP presidential nominating contest after a poor showing in Iowa, addressed members of Ralph Reed's Faith and Freedom Coalition, a Christian conservative group of ministers and politicians who support the amendment.

The group's members are looking for ways to win at the ballot box in November.

(Relate: Minnesota voters divided on gay marriage ban.)

Jordan Sekulow, chief counsel of the D.C.-based American Center for Law and Justice, advised ministers on how to speak out on the issue without violating their tax-exempt status.

“When you talk about moral issues – so not just like how to vote on an amendment, abortion, or gay marriage or a marriage amendment but on moral issues – you cannot directly tie it to a candidate,” he said.

Bachmann, who as a state senator sponsored a similar amendment, suggested selling the measure as a right to vote issue.

“I think if you want to talk to people who are not interested in talking about the morality you can also come at it as 'should people be allowed to vote,'” Bachmann said.