Top U.S. security official says he cannot send law enforcement to polling sites

U.S. President Donald Trump's top homeland security official said on Sunday that his department does not have the authority to send law enforcement to polling sites during the November election despite Trump's suggestion that federal officers could be deployed to guard against election fraud."That’s not what we do at the Department of Homeland Security," Acting Secretary Chad Wolf said on CNN'S "State of the Union."Trump has said repeatedly and without evidence that a shift to universal ma