Republican presidential candidate and die-hard Yankees fan Rudy Giuliani says he'll be rooting for the Red Sox in the World Series.

Giuliani gave his endorsement during a campaign stop in Boston today, but he insisted that he wasn't doing it just because he was in Massachusetts.

The former New York mayor said he's an American League fan, so would always root for the American League team in the World Series unless they were playing the New York Mets.

The Red Sox play the Colorado Rockies in the World Series, with Game 1 set for tomorrow night at Fenway Park. Giuliani says he'll restate his pro-Red Sox position when he campaigns in Colorado.