There's a word for this affliction of arrogance. It's called Hubris. It's a term from ancient Greece that means extreme pride or self-confidence. Think of it as a precursor to madness. The old Greek gods found it offensive and so they invented something to punish it, Nemesis.
Does this sound familiar? From Wiki:
Hubris is usually perceived as a characteristic of an individual rather than a group, although the group the offender belongs to may suffer consequences from the wrongful act. Hubris often indicates a loss of contact with reality and an overestimation of one's own competence, accomplishments or capabilities, especially when the person exhibiting it is in a position of power.
I think that's pretty much got Shifty to a T. That "loss of contact with reality" is on display every day when this prime minister fends off questions about the previous day's evidence in the Duffy trial that directly contradicts Harper's own narrative. He doesn't just "lose contact with reality" but rejects it outright when he dismisses the statements of his own inner circle given to police investigators and now, under oath, before a court of law.
According to the Special Counsel to this prime minister, Shifty overestimated his own competence and capabilities when he decided, despite his lawyer's advice to the contrary, that simply owning property in another province made the owner eligible for appointment to the Senate. Who needs the restraints of informed decision making when you're Furious Leader, the Smartest Man in the Room?
It's his own, absolute arrogance that got Harper in this mess. He thought he was above the rules, above the law and from that wobbly perch he issued decrees that would destabilize his administration.
Oh yeah, about that other thing, the yin to the yang, Nemesis. Put simply, nemesis is the divine retribution visited upon those who succumb to hubris. You might remember Nemesis as the Goddess who really screwed up Narcissus and that other fellow, Hitler (damn, I did it again. sorry). It seems she's now hovering over our very own Prince of Darkness.
As the trial grinds on it grinds down our prime minister, even in the eyes of his own supporters. Nemesis has Shifty by both lapels and he can't get away, he's stuck just as Narcissus was stuck at the reflecting pool.