Rudy Giuliani is defending Donald TrumpDonald John TrumpRosenstein expected to leave DOJ next month: reports Allies wary of Shanahan's assurances with looming presence of Trump States file lawsuit seeking to block Trump's national emergency declaration MORE's remarks that President Obama created the Islamic State in Iraq and Syria (ISIS).

“I think what he’s saying, there is legitimate political commentary,” Giuliani, a Trump supporter, said Thursday on CNN’s “New Day.”

“It is true in the sense that before Obama, ISIS was an almost unknown, small little organization. He even called it the JV. Totally wrong.”

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Giuliani said Obama’s decision to withdraw troops from Iraq allowed ISIS to gain a foothold.

“Here’s why it happened: He withdrew the troops from Iraq,” said Giuliani. "General [David] Petraeus had secured the eastern part of Iraq."

“It wasn’t in turmoil, it wasn’t in revolution and it wasn’t breeding terrorists,” he continued. "He had gotten the support of the Sunni tribes.

“When we pulled out, and the Obama administration and our secretary of State were unable to get a security of forces agreement for our troops, that’s when ISIS formed. That’s what [Trump] means by it.”

Trump on Wednesday blamed Obama and Hillary ClintonHillary Diane Rodham ClintonRoger Stone shares, quickly deletes Instagram photo of federal judge on his case Barack, Michelle Obama expected to refrain from endorsing in 2020 Dem primary: report Why the national emergency? A second term may be Trump’s only shield from an indictment MORE, his former secretary of State, for allowing ISIS to form.

“ISIS is honoring President Obama,” he said during a rally in Fort Lauderdale, Fla. "He is the founder of ISIS. He founded ISIS.

“I would say the co-founder would be crooked Hillary Clinton,” he added of the Democratic presidential nominee.

“We should never have gotten out the way we got out. We unleashed terrible fury all over the Middle East," said Trump.