Republican US presidential candidate Jeb Bush says his brother, former President George W. Bush, is not responsible for the September 11, 2001 terrorist attacks in the United States.

„Look, my brother responded to a crisis, and he did it as you would hope a president would do,“ Bush told CNN on Sunday, after leading White House contender Donald Trump blamed Bush for the attacks.

„He united the country,“ Bush added. „He organized our country, and he kept us safe. And there’s no denying that. The great majority of Americans believe that.“

On Friday, Trump blamed George W. Bush for the 9/11 attacks. On Sunday, Trump said that if he had been president in 2001, his immigration policy would have kept al-Qaeda terrorists from attacking the United States.

Bush said Trump is just trying to gain political advantage by bringing up the issue of the September 11, 2001 attacks.

„I don’t know why he keeps bringing this up,“ Bush said of Trump’s 9/11 comments. „It doesn’t show that he’s not a serious person as it relates to being commander in chief and being the architect of a foreign policy.”

The September 11, 2001 attacks, also known as the 9/11 attacks, were a series of strikes in the US which killed nearly 3,000 people and caused about $10 billion worth of property and infrastructure damage.

US officials assert that the attacks were carried out by 19 al-Qaeda terrorists but many experts have raised questions about the official account.

They believe that rogue elements within the US government orchestrated or at least encouraged the 9/11 attacks in order to accelerate the US war machine.