The positions of President Barack Obama and Mitt Romney on gay marriage are being spotlighted after Vice President Joe Biden's Sunday remarks on the subject.

Appearing on NBC's Meet the Press, Biden told host David Gregory that he is “absolutely comfortable” with gay couples marrying, then added that “The president sets the policy.”

The remarks suggest that Biden was endorsing marriage equality since President Barack Obama does not, though the president does support civil unions for gay couples and is opposed to marriage bans.

But in a statement released shortly after Biden's interview aired, an aide rolled back his apparent endorsement, saying the vice president's views are still “evolving.”

In an interview with CNN anchor Piers Morgan, Obama adviser David Axelrod insisted that Obama and Biden share the same views on the issue and it is Romney who differs.

“I feel, Piers, that on the policy the vice president was describing there that they are in complete accord,” Axelrod said. “That is the president's policy, he believes that heterosexual couples, gay couples should have the same legal rights. And, of course, that's why we've stopped appealing the DOMA case. Because he believes it's unconstitutional for states not to recognize – the government not to recognize – marriages that are legally recognized by the states. What the vice president was stating there was very much in keeping with that policy.”

When pressed by Morgan, Axelrod added that Obama is opposed to marriage bans, then added: “By the way, this is a big distinction between him and Governor Romney.”

Axelrod noted that Romney supports a federal amendment banning gay marriage. (The video is embedded in the right panel of this page. Visit our video library for more videos.)