Why did our intelligence agencies — the FBI, the Capitol Police, the Secret Service — all fail to protect the Capitol from being attacked on January 6th? We talk with Carol Leonnig, a 'Washington Post' National Investigative Correspondent, who contributed to this week's three part series in the 'Post' investigating what happened before, during and after the Capitol siege. She'll tell us how Trump froze in place key federal agencies whose job it was to investigate and stop threats to national security. Leonnig is also the co-author of two books about the Trump presidency: 'A Very Stable Genius,' and 'I Alone Can Fix It,' as well as a recent book about the rise and fall of the Secret Service.