Senator and 2020 Presidential Candidate, Senator Cory Booker joins Ari Melber for a wide-ranging interview on the Mueller probe, Attorney General Bill Barr’s summary of it and why he believes the war on drugs has been a “war on American people”. Booker reveals that he is “not willing to conclude anything” based on Barr’s summary of the Mueller probe, including anything about Trump and potential collusion with Russia, because he is “deeply troubled” by Barr himself.