WASHINGTON - Rudy Giuliani came out yesterday against President Bush's call for a ban on gay marriage. The former mayor, who Vice President Cheney joked the other night is after his job, vigorously defended the President on his post-9/11 leadership but made clear he disagrees with Bush's proposal to rewrite the Constitution to outlaw gays and lesbians from tying the knot. "I don't think it's ripe for decision at this point," he said on NBC's "Meet the Press." "I certainly wouldn't support [a ban] at this time," added Giuliani, who lived with a gay Manhattan couple when he moved out...