Giuliani: Democrats Would Raise Taxes More than They Promise

Former New York City mayor Rudy Giuliani (R) says he knows that lower taxes yield more revenue.

In his latest TV ad, Giuliani says Democratic presidential hopefuls Sen. Hillary Rodham Clinton (N.Y.), Sen. Barack ObamaBarack ObamaTrump's new debate challenge: Silence WATCH LIVE: Obama speaks at African American Museum opening Obama talks racial tension at African-American museum opening MORE (Ill.), and former Sen. John Edwards (N.C.), "are making the promise to raise taxes."

"The only thing I can tell you in addition to that is they'll raise taxes even more then they promise," Giuliani says.