As relates to politics
Has anyone ever heard of the "Dark Triad?" If you have not it might be worthwhile to investigate these personality traits.
Briefly, the Dark Triad is a group of three personality traits: narcissism, Machiavellianism and psychopathy. Use of term "dark" implies that people scoring high on these traits have malevolent qualities.
Narcissists: "Grandiose self promoters who continually crave attention
Machiavellians: master manipulators...think Bernard Madoff
Psychopaths: callousness, impulsivity, manipulativeness and grandiosity
I am sure some politicians will come to mind that probably score high on the DT test.