On Friday, marriage equality opponent Rob Portman (R-OH) abruptly changed his opinion on gay marriage after finding out his son is gay.

House Speaker John Boenher (R-OH), who is leading the defense of the Defense of Marriage Act (DOMA) in court, addressed Portman's position change on ABC's This Week on Sunday, telling host Martha Raddatz he "can't imagine" ever supporting the idea of gay marriage.

Here's the transcript, courtesy of ABC News:

SPEAKER JOHN BOEHNER: He has, in fact-- called. Listen, Rob's a great friend and a long-time ally. And I appreciate that he's decided to change his views on this. But I believe that marriage is a union of-- of a man and a woman.

MARTHA RADDATZ: Can you imagine yourself in a situation where you reversed your decision, as Portman has, on gay marriage if a child of yours or someone you love told you they were gay?

SPEAKER JOHN BOEHNER: Listen, I believe that marriage is the union of one man and one woman. All right. It's what I grew up with. It's what I believe. It's what my church teaches me. And I can't imagine that position would ever change.

MARTHA RADDATZ: Will Portman said it was not a choice. So, how do you justify denying him a right to marriage?

SPEAKER JOHN BOEHNER: Listen, I think that Rob can make up his own mind, take his own position. But I've made clear my position.