Former GOP presidential candidate Rick Santorum has weighed in on Republicans urging the Supreme Court to support gay marriage.

The Republicans added their names to a legal brief organized by Ken Mehlman, a former RNC chairman who came out gay in 2010 to advocate on the issue. The brief will be filed on Thursday in support of a suit challenging the constitutionality of Proposition 8, California's 2008 voter-approved constitutional amendment limiting marriage to heterosexual couples.

(Related: Meg Whitman, Jon Huntsman join other Republicans in support of gay marriage.)

On Wednesday, The New York Times reported that the number of Republicans joining the brief had risen to over 100.

During an appearance on CNN, Santorum, a vocal opponent of gay rights, was asked why Republicans oppose marriage equality so strongly.

“Well, why take a strong stance for it?” Santorum answered. “We should all bring to the table what we think is in the best interest of the country.”

“I know Ken. I like Ken. I've worked with Ken for years. And Ken and I disagree on this issue. We disagree adamantly on this issue. But I respect his right to go to the court and make his case.” (The video is embedded on this page. Visit our video library for more videos.)