People
Politics is not the art of the possible. It consists of choosing between the disastrous and the unpalatable.
— John Kenneth Galbraith

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker rejects the familiar claim that politics is about what's possible and offers a gloomier version: it's picking the lesser of two bad outcomes. The wit lies in setting 'disastrous' against 'unpalatable,' where neither choice is appealing.
Context reviewed