Donald Trump said on Saturday that President Barack Obama and former Secretary of State Hillary Clinton "created ISIS." Like many of Trump's charges this one doesn't hold much water. Clinton left the State Department in January 2013 and ISIS wasn't even founded until three months later. But Trump's charge does raise an interesting question, which is how best to assign responsibility for the rise of ISIS, including the issue of how might the Obama administration's exit from Iraq at the end of 2011 have helped smooth the path for ISIS? It began with a thug The rise of ISIS starts...