Media mogul Arianna Huffington has credited President Barack Obama for increasing support for gay marriage.

The 62-year-old Huffington, best known for her news website The Huffington Post, made her remarks during an appearance on Larry King Now.

Pointing to the more than 100 Republicans who signed on to a brief in support of a case before the Supreme Court challenging the constitutionality of Proposition 8, California's 2008 voter-approved amendment which limits marriage to heterosexual unions, host Larry King called the shift in support “revolutionary.”

The pair agreed that Obama has led on the issue.

“He led and it shows what leadership can do,” Huffington said. “When he actually finally said what was the truth about same-sex marriage in terms of what he believed, because nobody ever thought he believed otherwise. Makes me feel very optimistic about how you can actually change public opinion and policy on not just same-sex marriage but on many other issues, if there is a concerted effort.” (The video is embedded on this page. Visit our video library for more videos.)