In many sports, there’s the notion of an unforced error. It's something that the player did that costs the player, or their team.
In the game of politics, politicians commit unforced errors as well. But when you’re talking about the ultimate prize of power, those unforced errors can be more damaging than a simple dropped shot.
Recently, there have been two major unforced errors committed by both sides of the political fence. While the scores may be different for both sides, the damage done shows the lack of strategy and, at its core, thinking by both players.