Former Director of National Intelligence James Clapper says the people he's talked to within the FBI are dismayed and quite shocked at the firing of former Director James Comey. Clapper tells CNN's "State of the Union" it's had a disturbing and negative impact within the Bureau. At the same time, the former general laid into President Trump describing his latest tactics as an assault on our institutions of government. Clapper says the system of checks and balances is challenged by this president.