A few anecdotes from my side: - I had one colleague and a former boss, both staunch Democrats, who knew GW Bush from Yale; they both independently mentioned to me how likeable he is in person vs. how bad he's in his policies. This comes in contracts to Obama (who my ex-boss had met in a fundraising dinner) who's super likeable/charismatic publicly but a bit distant/aloof in person. - As for the WMDs in Iraq, it's the classic intelligence fallacy; "send my people to find evidence for X", and guess what, your minions _do_ find plenty of data to support their boss's view! This happens to all organisations from govt. to companies - and will be only made worse with "Big Data" and "AI"