Donald Trump warned of a terrorism threat facing the United States one year before the 9/11 attacks. Getty Images

Republican presidential front-runner Donald Trump informed Sean Hannity in an appearance Tuesday that he predicted a major terror threat for the United States in a book he released one year before the Sept. 11, 2001, terror attacks. "I actually said in the book that something would happen," Trump told the Fox News Channel host.

In his 2000 book, "The America We Deserve," Trump wrote that he foresaw a terrorist threat larger than the Feb. 26, 1993, World Trade Center bombing that occured below the North Tower, which killed six people and injured hundreds.

“I really am convinced we’re in danger of the sort of terrorist attacks that will make the bombing of the Trade Center look like kids playing with firecrackers,” Trump wrote. “No sensible analyst rejects this possibility, and plenty of them, like me, are not wondering if but when it will happen.”

Trump also told Hannity that in his book, he mentioned Osama bin Laden by name. "People can't believe it," Trump said. "It was the only political book I'd ever done and people can't believe that I mentioned [him]." Trump wrote:

“One day we’re told that a shadowy figure with no fixed address named Osama bin-Laden is public enemy number one, and U.S. jetfighters lay waste to his camp in Afghanistan. He escapes back under some rock, and a few news cycles later it’s on to a new enemy and new crisis.”

Trump appeared on "The Sean Hannity Show" Tuesday evening to discuss his ongoing feud with former Florida Gov. Jeb Bush, who is also seeking the Republican Party's 2016 presidential nomination. Trump sparked the fight with Bush on Friday morning when he suggested that Bush's brother, former President George W. Bush, was to blame for the 2001 attacks.

"He was president, OK? ... Blame him, or don't blame him, but he was president. The World Trade Center came down during his reign," Trump said on BloombergTV.

From there, the fight spilled onto Twitter, where Jeb Bush called Trump’s comments “pathetic.” He tweeted: “We were attacked & my brother kept us safe.”

Trump said Tuesday evening that he still disagrees with Bush's comments. "Jeb said our country was safe. Well, that's not safe," Trump said, referring to the 9/11 attacks.

Despite the feud, Trump told Hannity that he would still vote for Bush if Bush were to win the Republican nomination. "I would absolutely support him," Trump said. "He's a good person. He's a good man."

Trump had been scheduled to appear on ABC's "Jimmy Kimmel Live" Tuesday evening, but pulled out of the appearance Monday evening, Politico reported.

"I have a big political event," Trump told Hannity. "I can't skip it."