TALLAHASSEE, Florida (CNN) -- Former New York City Mayor Rudy Giuliani said Wednesday he does not believe in "discrimination against gays," but said now is not the time to question the military's 'don't ask, don't tell' policy, in an interview with CNN's Dana Bash.

"I think the policy that we have right now, we should leave alone," Giuliani said. "We are in a time of war."

"When we get out of the crisis, when we get out of the situation, we can consistently review it and look at it-- but it shouldn't be done right now," he added. "It would be a very big mistake to re-raise that issue right now when we are dealing not just with Iraq, but this entire war on terror."

Giuliani also reiterated his personal opposition to gay marriage.

"Unlike what some of my opponents have said, I'm not in favor of gay marriage," he said. "I have consistently said marriage should be between a man and a woman. I do think that people who have a sexual orientation one kind or another should not be discriminated against."

The GOP presidential candidate also said it's not his place to judge whether homosexuality is immoral.

"It isn't my role to determine what is a sin, what isn't a sin," he said. "What my role is, what is legal, what is illegal, I have been really clear on that role throughout my life."