State campaign finance officials ruled Tuesday that those who give money to support or oppose ballot questions -- such as the next year's proposed amendment to ban same-sex marriage -- will have to disclose their donations.
The guidelines continue a months-long process of board action to define exactly what the law requires about money spent on constitutional campaigns and comes just as the fight over a constitutional amendment defining marriage comes to the fore.
"Minnesota has become ground zero for a national fight over whether the public should know who is behind political spending," said Mike Dean, executive director of Common Cause Minnesota, which pushes for more disclosure.
The board's policy would require donors' names to be made public if they specifically designated funds toward a ballot question or if they were asked by another organization to give money to support or oppose a ballot question. That could allow some donors to the National Organization for Marriage and other non-Minnesota-based organizations to go unnamed but would require disclosure of others.
Amendment supporter John Helmberger, the chairman of Minnesota for Marriage, said the campaign would comply with disclosure laws but that board's move amounted to "illegal regulations."
An attorney for the National Organization for Marriage, which opposes gay marriage, says the ruling may vastly increase the number of donors whose names would have to be revealed.
The tensions over donor disclosure are just a prelude to the fight that's just over the horizon in Minnesota. The constitutional question on whether to define marriage as the union of one man and one woman is expected to attract millions of dollars and a national spotlight to the 2012 vote.
The board's Tuesday decision may not be the final word on the issue. Conflicts over disclosure of marriage amendment campaign donors have landed in court in several states and the same may happen here.