This has nothing to do with when the production started. It has to do with when it was released.
OK. If they released it to knock Mitt out of the primary, their strategy is idiotic.
They should have waited a year, hoping he’d be nominated, and then release it shortly before the general election.
How in the world does eliminating Romney from the primaries help the Democrats? Only if you think Mitt is the most electable candidate, which is at best debatable.
Since it happened on September 11th, 1857, I wonder if the release date has anything to do with the 150th anniversary of the massacre on September 11th 2007?