Rep. Joe Courtney says he had no idea he was wading into controversy when he questioned the accuracy of a key scene in “Lincoln.”

After all, he knows Washington politics, not Hollywood politics.

Last week, the Connecticut Democrat called on Steven Spielberg to “correct an historical inaccuracy” in the Oscar-nominated box-office hit — a scene, at the film’s climax, suggesting that two of his state’s three representatives voted against outlawing slavery in 1865.

Courtney told us Monday he was captivated by the movie until it came to that moment: How, he wondered, could a Connecticut congressman have voted that way? “Our state abolished slavery completely in 1848. Children of slaves were emancipated by 1784,” he said. “The Harriet Beecher Stowe house in Hartford is a shrine in Connecticut history.” Courtney checked and discovered that the movie was wrong: In fact, all four of the Nutmeg State’s delegates voted for the 13th amendment....