Donald Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE said early Tuesday that he is unsure if former President George W. Bush lied about weapons of mass destruction heading into the 2003 invasion of Iraq, softening his rhetoric from the campaign trail.

“I don’t know if he lied or not,” he told host George Stephanopoulos on ABC’s “Good Morning America.” “I just know that there are no weapons of mass destruction.”

WATCH: "I don't know if he lied or not..." - Trump on former Pres. George W. Bush and WMDs in Iraq https://t.co/CVtTpIj0bs ADVERTISEMENT February 16, 2016

Trump also criticized the Bush administration’s national intelligence infrastructure for failing to predict the 9/11 terrorist attacks.

“I know that the CIA and various other agencies knew that something bad was going to happen, and they did nothing about it,” he said. “They got it wrong."

“The heads of the CIA and the various other agencies weren’t speaking and it was a big problem,” the New York business mogul continued.

“Three years before the World Trade Center came down, I wrote about Osama Bin Laden in my book,” Trump added, referencing the al Qaeda leader who orchestrated the 2001 attacks. “He was a bad dude and he should have been taken out.”

Trump accused the Bush administration of dishonesty about the Iraq War during the GOP’s ninth GOP presidential debate in Greenville, S.C., last Saturday.

He has repeatedly invoked both the conflict’s unpopularity and the Bush family itself as a means of criticizing Jeb Bush, his Republican presidential primary rival.

Jeb Bush countered last Saturday that he is “sick and tired” of Trump using his family’s legacy against him.

Former President Bush introduced his sibling late Monday at a rally in North Charleston, S.C., ahead of Saturday’s GOP presidential primary there.