Unions have waded in. Volunteers are being prepped to work at the State Fair. And e-mails and fundraising appeals are flying.
A full 15 months before Minnesota voters decide whether to cement a ban against same-sex marriage into the state Constitution, the campaign over the amendment is already heating from a simmer to a full boil.
Groups on both sides of the proposed amendment have ramped up their fundraising machinery -- amid suggestions the campaign could top $10 million -- and have boosted their efforts to enlist armies of volunteers.
But the organizing faces two daunting realities: Extravagant gushers of cash and ground troops have had little effect on voters in other states, and anti-amendment groups have been largely ineffective elsewhere in preventing the measures from passing.
A study published last year by New York University political scientist Patrick Egan found that in 33 states where marriage and domestic-partner ballot issues have been decided since 1998, the campaigns have not changed voters' minds.
Examining polling data, Egan concluded that both sides "have largely fought to a draw, in that the share of the public saying they intend to vote for or against these measures typically changes very little over the course of these campaigns."
The Human Rights Campaign, the nation's largest gay rights advocacy group, is nonetheless one of a growing number of organizations on both sides of the issue in Minnesota that are already raising money. Seven groups -- four opposing the amendment, three favoring it -- have registered with the state's Campaign Finance Board.
Representatives of the organizations declined to say how much they've raised so far or what their eventual goals will be, but based on earlier statements and the history in other states, $10 million or more could be spent between now and Election Day in 2012.