Governing parties do not become oppositions overnight. Well, strictly speaking, they do. Come an election, regimes fall between polls closing at 10pm on Thursday and ousted leaders conceding on Friday morning.
But there is a more gradual transition to opposition as a state of mind – an exhaustion of the will to govern and a dissolution of discipline into factional rancour. That journey precedes an election defeat but also makes one more likely. MPs lose hope of victory. The leader runs out of inducements to loyalty. Attempts to show strength fail, advertising weakness instead.