Maryland, Maine, Washington state, and Minnesota will vote on gay marriage Tuesday,Politico reports.
The battle for gay marriage is tight in all four states, but Maryland and Maine seem to have majorities supporting gay marriage, according to Politico.
In Minnesota, voters will decide whether to define marriage as between a man and a woman.
Meanwhile, voters in Maine, Maryland, and Washington state are going to vote on whether their states should legalize same-sex marriage.
President Barack Obama and Mitt Romney have starkly opposing views of gay marriage.
The president finally voiced his support for same-sex marriage this year after Joe Biden forced the issue by expressing his own support for gay unions.
Meanwhile, Romney opposes marriage for gays as well as "civil unions identical to marriage."
The four states will take up the issue following a New York federal appeals court's finding that the Defense of Marriage Act is unconstitutional.
The U.S. Supreme Court will almost certainly weigh in on gay marriage this year, Justice Ruth Bader Ginsburg has said.
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