Rudy Giuliani is defending Donald TrumpDonald John TrumpKimberly Guilfoyle reports being asymptomatic and 'feeling really pretty good' after COVID-19 diagnosis Biden says he will rejoin WHO on his first day in office Lincoln Project offers list of GOP senators who 'protect' Trump in new ad 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 ClintonHillicon Valley: Facebook civil rights audit finds 'serious setbacks' | Facebook takes down Roger Stone-affiliated accounts, pages | State and local officials beg Congress for more elections funds OVERNIGHT ENERGY: Sanders-Biden climate task force calls for carbon-free power by 2035 | Park Police did not record radio transmissions during June 1 sweep of White House protesters | Court upholds protections for Yellowstone grizzly bears GOP Miami mayor does not commit to voting for Trump 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.