Republican presidential front-runner Donald Trump said Wednesday that if he's elected president he would send back Syrian refugees taken in by the U.S. because they may be Islamic State militants in disguise.
The billionaire businessman, who is leading early opinion polls, said during an hour-long speech - which included several profanities - that he was worried the refugees, who have been fleeing their country after years of civil war, could be Islamic State militants looking to get into the U.S.

"They could be ISIS, I don't know," said Trump, who questioned both the number of men in their ranks and why Syrians were fleeing their country instead of staying and fighting.
Trump also repeated his support Wednesday for Russia's military involvement in Syria, the same day that Russia launched airstrikes that U.S. Defense Secretary Ash Carter said appeared to have targeted areas that did not include IS militants.