US homeland security chief: Security a failure at Trump rally site

The U.S. homeland security chief said Monday that the attempted assassination of former President Donald Trump over the weekend at a political rally was "a failure" in security that could not be allowed to occur again.

"When I say that something like this cannot happen, we are speaking of a failure," Homeland Security Secretary Alejandro Mayorkas told CNN. "We are going to analyze, through an independent review,