It doesn't matter if some democrats are more left leaning than others. They are traditionally anti-gun, and for any of them to back away from such a huge anti-gun tearjerker like this is definitely significant.
Firstly, interpretations can vary amongst those with honorable intents, does that make it not factual? Did I ever present something as something it isn't? Also, moore uses his facts and pus them together effectively.
This movie is still a documentary by classification and definition. It uses facts and documents (roughly Websters definition) to make and support a point.
Also, democrats aren't traditionally what you're saying. Firstly, democrats were traditionally rural, conservative people. Don't say something that general as the more general it is the easier it is to shoot down.
So what if democrats are traditionally anti-gun. Did they back away? Did I say that? No.
Republicans are traditionally small government. Look how much that matters right now.