Florida Governor – and U.S. Senate hopeful – Charlie Crist said Sunday that he supports putting a gay marriage ban in the U.S. Constitution.

Speaking on CNN's State of the Union, Crist said: “When it comes to marriage, I think it is a sacred institution, I believe it is between a man and a woman.”

But Crist, who is running in Florida's Senate race as an independent, added that he's a “live and let live kind of guy.”

“[P]artners living together, you know, I don't have a problem with it,” he said. “It's just how I feel.”

Gay activists in Florida had hoped that having left the GOP behind, Crist would come out in favor of gay rights. In a June interview with Time magazine, Crist suggested he was contemplating a change of heart.

In that interview, he came close to saying he's in favor of allowing gay people to adopt.

Florida is the only state in the nation that bans gay men and lesbians from adopting children outright. Last year, a judge ruled the law to be unconstitutional and the state appealed.

“I think probably the best decision maker would be a judge,” Crist said on the issue. “Currently, we have a law on the books in Florida though that precludes that from happening. I'm sure that a future Legislature and maybe the next governor might address that issue.”

But even in June, the governor, who's been the subject of numerous gay rumors himself, disappointed gay marriage backers when he said that he supports government recognition of gay couples with civil unions, not marriage.

UPDATE: Charlie Crist says he does not support a federal gay marriage ban.