Full title: WATCH: Brennan Explains His Bogus Reasoning He Believes It's 'Outrageous' For Barr To Investigate Russia Probe Origins President Donald Trump on Thursday granted Attorney General William Barr the authority to declassify information relevant to the investigation into how spying on the Trump campaign started in 2016. Former CIA Director John Brennan appeared on MSNBC's "All in with Chris Hayes" to discuss the decision.