Donald Trump said that if he been President of the United States instead of President Obama, the Islamic State (ISIS) wouldn’t have expanded after the U.S. pulled out of Iraq because he would have taken the oil.

“Take the oil,” Trump declared when asked what he plans to do after defeating ISIS during NBC’s Commander-in-Chief forum on Wednesday night.

Trump said he believes Obama failed in the manner he pulled American troops out of the Middle East and that he would have taken the oil because ISIS formed based on that wealth, according to the Republican nominee.

“ISIS would not have been able to take oil and use that oil to fuel themselves,” he explained.