Donald Trump's campaign manager, Corey Lewandowski, said in a radio interview on Monday that the Bush administration either "ignored" or "chose to do nothing" about threats from al-Qaeda before the attacks of Sept. 11, 2001.

"In the administration of George W. Bush, the CIA was not talking to the DIA which was not talking to the FBI," Lewandowski said Monday on Breitbart News Radio. "They were well aware that things were taking place both on our soil and internationally. And, they either chose to do nothing about it, maybe through miscommunication, or weren't prepared for it, or ignored it."

"I don't know which one it was, and it's not for me to say, but what we do know is we had the worst terrorist attack on our soil during that administration — and that's very clear, in a lifetime," he continued. "And, the War in Iraq was a disaster. Those two things are basically unequivocal."

At the the Republican debate on Saturday, Trump loudly noted that it was fact the World Trade Center collapsed on Bush's watch,and that the Bush administration subsequently lied the American people to draw support for the invasion of Iraq. Said Trump at the debate: "They said there were weapons of mass destruction. There were none and they knew that there were none."