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MINNEAPOLIS (AP) - The campaign working to pass Minnesota's constitutional amendment to ban gay marriage has raised about $3 million in the final stretch of the race.

Minnesota for Marriage released its latest fundraising totals Tuesday. Its chief opponent, Minnesotans United for All Families, had reported raising about $3.5 million over the same period.

Minnesotans United has significantly outraised Minnesota for Marriage, with a total haul of more than $11 million compared to $5.1 million. That makes it easily the most expensive campaign over a constitutional amendment in Minnesota's history.

Both campaigns have spent much of what they've raised, largely on TV commercials.

Marriage is already defined in state law as between one man and one woman, but the proposal would define it that way in the state constitution.