Story highlights Giuliani is a former New York mayor

He was in office during 9/11

Youngstown, Ohio (CNN) Rudy Giuliani, who served as mayor of New York City during 9/11, claimed Monday that there had not been "any successful radical Islamic terrorist attack in the United States" in the eight years before President Barack Obama took office.

But the September 11, 2001, terrorist attacks took place less than eight years before Obama was sworn into office in January, 2009.

"Under those eight years before Obama came along, we didn't have any successful radical Islamic terrorist attack in the United States. They all started when (Hillary) Clinton and Obama got into office," Giuliani said Monday in Ohio where Trump delivered a speech on radical Islamic terrorism.

Trump spokesman Jason Miller said Giuliani was referring to the period of time following the 9/11 terror attacks, and before Obama was sworn into office.

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