Trump targets key witnesses in Mueller probe

09:33

The White House announces Trump is looking to revoke the security clearances of former officials former CIA Director John Brennan, former Director of National Intelligence James Clapper, former FBI Director James Comey, former national security adviser Susan Rice, former deputy FBI Director Andrew McCabe and former National Security Agency Director Michael Hayden. Ari Melber breaks down how these former officials are also likely to be key witnesses in Special Counsel Mueller’s Russian investigation, while former RNC Chair Michael Steele tells “The Beat” President Trump is also "pissed because these folks are out there talking smack about what he's doing at the White House”.