- ISIS essentially began in 2004 as the Sunni terror group al Qaeda in Iraq
- It was largely defeated in Iraq by 2008, but went on to fight in Syria
- The revitalized group returned to Iraq in 2013, calling itself the Islamic State in Iraq and Syria
(CNN)Plenty has been said about Donald Trump calling President Barack Obama the "founder of ISIS." The GOP presidential candidate added to the conversation himself on Friday, tweeting that he was being sarcastic when he made the remarks.