A spokeswoman for Donald Trump's presidential campaign on Saturday claimed that President Obama brought United States forces into Afghanistan.

The Afghanistan war actually began in 2001 under President George W. Bush, in response to the Sept. 11 terror attacks.

"Remember, we weren't even in Afghanistan by this time. Barack Obama went into Afghanistan, creating another problem," Katrina Pierson said in an interview on CNN, referring to the completion of the withdrawal of U.S. military forces from Iraq in 2011.

CNN's Victor Blackwell then pressed her on what she meant, to which Pierson said of Afghanistan: "That was Obama's war."

In December 2009, Obama announced a surge of 30,000 droops to Afghanistan. The mission in Afghanistan has now been extended to 2017, as of October 2015.

Pierson's comments came in response to a question on if Trump was really being "sarcastic" when he said Obama was the "founder of ISIS."

"Of course it was sarcasm because he obviously didn't mean that Barack or Hillary Clinton founded ISIS in the literal sense, in other words, they didn't file the paperwork of incorporation," Pierson explained.

Instead, he was referring to the policies of Obama and Clinton, Pierson argued. Al Qaeda was "in ashes" after the Bush's 2007 troop surge during the Iraq War, Pierson said, but Obama and Clinton "then destroyed the entire rollout by wanting to pull out early."

"That is the reason why ISIS is a global issue," Pierson said.

Following a commercial break, Pierson argued again about the founding of the Islamic State. "I thought we were talking about the founding of ISIS. ISIS came out of the Obama side of the war. Is that not a fact?" Pierson said.

"No, it is not a fact," Blackwell replied.

Watch the interview above.