Minneapolis-area Lutherans on Friday went on record against changing the state Constitution to define marriage as between one man and one woman.
A relatively new state campaign finance law allows groups that give to ballot initiatives to protect the identities behind the donations.
With its signed statement, the Minnesota Rabbinical Association adds to the spirited debate in advance of the November vote.
Top groups in amendment fight have raised $2 million overall.
Republicans in Legislature are looking to cement their ideas into the state's founding document.
Prominent Minnesotans with deep pockets are among the 5,100 donors to the campaign to defeat the ban on same-sex marriage.
Church leaders say amendment that would ban gay marriage is a top issue in 2012 election.
The group, including businessman Wheelock Whitney, says it is united in defeating the proposed amendment.
Campaign finance officials issue guidelines amid tense debate over proposed marriage amendment.
Both sides in the gay-marriage debate are gearing up for a long fight over the constitutional amendment.
The DFL governor vetoed the measure, which will ask voters in 2012 whether to amend the state constitution to ban same-sex marriage. But in this case, his veto has no practical effect.
Both sides of the ballot issue defining marriage brace for an emotional, expensive campaign.
Votes Saturday as the House, on a 70-62 vote, approved sending a constitutional amendment banning gay marriage to 2012 voters. Voting yes were 68 Republicans and 2 Democrats. Voting no were 4 Republicans and 58 Democrats.
After a passionate nearly six-hour debate, the Minnesota House decided to let voters decide whether gay marriage should be constitutionally banned Saturday. Here are our live tweets, articles and other information from that powerful debate.
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