Tony Kushner thinks it's fine for a movie to "manipulate a small detail in the service of a greater historical truth."

"History doesn’t always organize itself according to the rules of drama. It’s ridiculous. It’s like saying that Lincoln didn’t have green socks, he had blue socks."

The green/blue sock equivalent ridiculousness in Kushner's screenplay was having Connecticut vote against the abolition of slavery when in fact it voted for.