The battle over gay marriage in Minnesota begins its shift from the ballot box to the state Capitol this month. Kickoff events for both sides are scheduled around Valentine's Day as essentially the same combatants from last year's constitutional-amendment campaign are getting set to square off over state law. "It's Minnesotans United for All Families and Minnesota for Marriage round two," said Autumn Leva, spokeswoman for Minnesota for Marriage, the lead group opposing gay marriage. Her side lost last time around, when voters in November rejected a proposal to add a definition of marriage as only the union of a man and woman to the state's constitution. But same-sex marriage remains prohibited under Minnesota law. That's what round two is about. Minnesotans United is planning a "Freedom to Marry Day" rally in the Capitol rotunda Feb. 14, with a bill expected shortly thereafter that would make Minnesota the 10th state in the nation to legalize same-sex marriage.