During his big foreign policy speech today, as he went after President Obama and Hillary Clinton, Donald Trump got a little personal in going after Clinton’s ability to fight ISIS. He said that the Obama administration downplayed the threat of ISIS and hasn’t done enough to fight, but then he said this: “She also lacks the mental and physical stamina to take on ISIS and all of the many adversaries we face, not only in terrorism but in trade and every other challenge we must confront.” Trump has recently taken to call Clinton 'unstable and unhinged.'