Massachusetts Rep. Barney Frank and Governor Deval Patrick on Sunday minimized the politics of President Barack Obama's gay marriage endorsement.

Appearing on CBS' Face the Nation, Patrick applauded Obama for his “clear and principled position.”

“It's about convictions; it's not about politics,” said Patrick.

Frank, who is preparing to marry his long-term partner Jim Ready in July before leaving Congress, said voters tuned-in to the gay marriage debate had already likely picked a side.

“If you were going to cast your vote based on a candidate's position regarding same-sex marriage, you were already going to vote for Obama [or] Romney based on that,” Frank, 72, said during an appearance on ABC's This Week.

Patrick, whose daughter Katherine publicly announced in 2009 that she's gay, agreed with Frank, saying: “Those are voters, I suspect, who are not likely to vote for the president anyway, unless they vote their interests, which are economic interests, and this president is four-square with them and standing with them in this election and in office.”