It wasn't a climatic point at all; it was added in as more of an "extra." The climactic point was the vote, the cheers, the bells ringing. What happened afterwards was more of an aside. And a very interesting one, at that.
I loved this film. It was inspiring, fascinating, sometimes tragic, sometimes funny and just really, really interesting. Daniel Day Lewis is so good in this role; he's beyond brilliant.
And, UM, the movie is about the passing of the 13th Amendment. How could anyone ever say there's "too much politics?" That's like watching a film about a flood and saying there's too much water.