Donald Trump, the FBI and nuclear secrets

The FBI raid that saw classified documents seized from Donald Trump's home doesn’t seem to have dented his political ambitions, or his influence on the Republican Party.  As ever more alarming stories surface about the kind of secret material Donald Trump had allegedly illegally taken to Mar-a-lago, the former president's latest political victim, Republican Liz Cheney, a harsh critic, has lost her primary, and with it her chances of re-election.  Today, US national security expert Karen Greenberg on a dangerous time in American politics.  Featured:  Professor Karen Greenberg, Director, Center on National Security, Fordham University School of Law, New York