Donald Trump says he was just being sarcastic when he repeatedly claimed Thursday that President Obama and Hillary Clinton were “the founders” and “MVPs” of the Islamic State terror group. “Ratings challenged @CNN reports so seriously that I call President Obama (and Clinton) ‘the founder’ of ISIS, & MVP. THEY DON’T GET SARCASM?” Trump, the Republican nominee for president, tweeted Friday morning in response to nationwide controversy over his remarks. The real-estate mogul initially made the comment to supporters in Fort Lauderdale late Wednesday evening, before reasserting the “joke” to various outlets like CNBC and talk-radio host Hugh Hewitt. In fact, the conservative radio talker offered Trump a chance to admit his rhetoric was a colorful way of suggesting the withdrawal of U.S. troops from Iraq led to ISIS’s creation, but the presidential candidate doubled down.