ABC News' Teddy Davis, Sunlen Miller, Tahman Bradley, and Rigel Anderson report: Barack Obama's nuanced position on same-sex marriage is on full display in an MTV interview which is set to air on Monday.
Obama told MTV he believes marriage is "between a man and a woman" and that he is "not in favor of gay marriage."
At the same time, Obama reiterated his opposition to Proposition 8, the California ballot measure which would eliminate a right to same-sex marriage that the state's Supreme Court recently recognized.
"I've stated my opposition to this. I think it's unnecessary," Obama told MTV. "I believe marriage is between a man and a woman. I am not in favor of gay marriage. But when you start playing around with constitutions, just to prohibit somebody who cares about another person, it just seems to me that's not what America's about."
"Usually, our constitutions expand liberties, they don't contract them," he added.
MTV will release the interview as a 30-minute special on Monday at 9:00 am ET and 7:00 pm ET.