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MINNEAPOLIS - Opponents of Minnesota's constitutional amendment to ban gay marriage are pushing to get out the vote as the race enters its pivotal final week.

Hundreds rallied for Minnesotans United for All Families at the University of Minnesota Monday. Speakers included Sens. Amy Klobuchar and Al Franken along with Vikings punter Chris Kluwe, who called the proposed gay marriage ban "stupid."

Minnesotans United hopes to reach a million voters in the next week, urging them to go to the polls.

Minnesota for Marriage, which supports the amendment, plans no rallies. But a spokesman says the campaign's get-out-the-vote effort is in full swing, too.

Backers of the amendment say it's needed to make sure that voters, not elected officials or judges, can decide the definition of marriage in the future.