(CNN) Scott Walker said same-sex marriage proponents should respect the religious opinions of those who disapprove of same-sex couples having the right to legally wed.

Speaking in Denver at the Western Conservatives Summit on Saturday, the Wisconsin governor spelled out his criteria for judges and weighed in on the religious liberty debate.

"To me, it is not freedom from religion, it is freedom of religion, which ultimately means we have the right to practice our religious beliefs and not have others interfere," he said in an onstage interview with conservative radio host Hugh Hewitt.

"We should respect the opinions of others in America, but that in return means that they not only respect our opinions, they respect what is written in the Constitution," he said.

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