Giuliani criticizes the leading Democrats in a new TV ad.
WASHINGTON (CNN) - In a new television ad touting his record as New York City mayor, Republican presidential candidate Rudy Giuliani takes a swipe at Democratic candidates, saying they're sure to raise taxes once they reach the Oval Office.
"I know that reducing taxes produces more revenues. Democrats don't know that," Giuliani says in the ad, titled "Promise", which begins airing in New Hampshire and Boston television markets Thursday. He said Hillary Clinton, Barack Obama, John Edwards have promised to raise taxes.
"The only thing I can tell you in addition to that is they'll raise taxes even more than they promise," says Giuliani.
- CNN Political Assignment Editor Katy Byron