The last line of the movie is:
"What do we do now?"
This line, spoken by McKay to his campaign manager, has a powerful ambiguity that reflects the film's central themes.
Here's how the line can be interpreted:
* McKay's personal dilemma: He has won the election, but he's lost his own integrity and sense of purpose. He's deeply disillusioned with the political process and unsure how to move forward.
* The larger political landscape: The line speaks to the broader political climate, suggesting the challenges and uncertainties that lie ahead. It questions the efficacy of the political system and raises doubts about whether meaningful change is truly possible.
* The film's lasting impact: The line leaves the audience with a sense of unease and uncertainty, challenging them to consider the implications of McKay's victory and the future of American politics.
It's important to note that the film doesn't offer a clear answer. This ambiguity is deliberate, inviting viewers to ponder the complex nature of politics and the personal sacrifices it often demands.