(Washington Examiner) Speaking at the Conservative Political Action Conference on Thursday, Sen. Marco Rubio asserted the right of states to define marriage — marking a major shift in the gay marriage debate.

Back in 2004, when President Bush proposed an amendment to the U.S. Constitution defining marriage as being between a man and a woman at the federal level, that was the default position for elected conservatives. Those Republicans who argued in favor of leaving the decision up to the states were seen as moderates or more libertarian-minded.

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