Jeb Bush gets testy at CNN debate about brother's record: 'There's one thing I know for sure, he kept us safe'
Donald Trump and Jeb Bush debate on CNN

GOP hopeful Jeb Bush lashed out at critics of his brother on Wednesday and insisted that the older Bush had kept America safe, regardless of the attacks on Sept. 11, 2001.

During the CNN Republican presidential debate at the Reagan Library, host Hugh Hewitt forced Jeb Bush to admit that he would draw foreign policy advisers from the presidencies of his father, George H. W. Bush, and his brother, George W. Bush.

"Of course, that's the case," Bush said. "But I'm my own man. I'm going to create a strategy that based on the simple fact that the United States need to lead the world."

"I will have a team that will follow the doctrine that I set up," he insisted. "And it will be peace through strength."

Donald Trump responded by reminding the other candidates that he had vocally opposed the Iraq war.

"It's about judgement," Trump opined.

"The lack of understanding about the way the world works is really dangerous," Bush shot back. "Is that the judgement that you bring to the table, that Hillary Clinton is a great negotiator?"

"Your brother and your brother's administration gave us Barack Obama," Trump interrupted. "It was such a disaster those last three months that Abraham Lincoln couldn't have been elected."

That comment clearly annoyed the former president's brother.

"As it relates to my brother, there's one thing I know for sure," Bush quipped. "He kept us safe. I don't know if you remember, Donald. Do you remember the rubble, you remember the firefighter with his arms around him? He sent a clear signal that the United States would be strong and fight Islamic terrorism."

"And he did keep us safe," the candidate concluded.

Watch the video below from CNN.