I wonder if this thread title is a misnoner that will send chasing chimeras. We we really have is an always existing set of events and a chained set of conditional probabilities. And when the chained probabilities reach some other high typical level, you can kiss democracy goodbye.
But the events are.
1. An abuse of power.---always too frequent
2. That the abuse of power is exposed. With a criminal conviction resulting.
3. The chance anyone can get away with pardoning the miscreant. And afterwards stay in a position of power so they can keep abusing power.