Republican presidential candidate Ben Carson is calling for a federal investigation into whether the nation's largest Muslim advocacy group, the Council on American-Islamic Relations (CAIR), has ties to terrorism. In a policy proposal released on Tuesday outlining his call for a declaration of war against the Islamic State in Iraq and Syria (ISIS), Carson said the State Department must investigate the Washington-based nonprofit group as an alleged "supporter of terrorism." "The Department of State should designate the Muslim Brotherhood and other organizations that propagate or support Islamic terrorism as terrorist organizations, and fully investigate the Council on American-Islamic Relations as...